8.05 g of CuSO₄ is the highest mass of crystals.
a) CuO(solid) + H₂SO₄(aqueous) → CuSO₄(aqueous) + H₂O(liquid)
Molecular weight,
CuO = 79 g
Molar weight of CuSO₄ = 159 g,
79 g of CuO reacted with H₂SO₄ 159 g to form CuSO₄.
∴ 4 g of CuO
= 159/79 × 4
= 8.05 g of CuSO₄
b) Percentage yield and Theoretical yield :
The Theoretical yield:
CuSO₄ of 159.6 g → CuSO₄.5H₂O of 249.5 g
8.05 g = 249.5 × 8.05 ÷ 159.6 = 12.58 g
And the percentage yield = Weight of the product ÷ Theoretical yield × 100
= 11.25 ÷ 12.58 × 100
= 89.42%
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the element tellurium forms a(n) with the charge fill in the blank 2. the symbol for this ion is , and the name is fill in the blank 4 ion. the number of electrons in this ion is .
The element tellurium forms an ion with the charge of +4.
The symbol for this ion is Te⁴⁺ and the name is tellurium ion.
The number of electrons in this ion is 48 electrons.
What are ions?Ions are substances that are formed when atoms of elements gain or lose electrons.
There are two types of ions based on the charge the ions carry:
Cations - they have a positive charge; for example, calcium ion, Ca²⁺, ammonium ion, NH₄⁺Anions - they have a negative charge; for example Chloride ion, Cl⁻, tetraoxosulfate (vi) ion, SO₄²⁻Metallic atoms form cations by losing one or more electrons.
Non-metallic atoms form negative ions by gaining one or more electrons.
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A hiker climbs to the top of a mountain at rate of 0.5 me/hr. What are the speed and velocity of the hiker?
A hiker climbs to the top of a mountain at rate of 0.5 m/hr. The speed of hiker is 1.3 x 10⁻⁴ m/s and the velocity of the hiker is 1.3 x 10⁻⁴ m/s west.
Speed is a scalar quantity. It is used to measure the distance traveled in a period of time. It is represented by -
s = d/Δt
where,
s = speed
d = distance
Δt = change in time
Velocity is a vector quantity. It is used to measure the change in position, that is, displacement over the change in time. It is represented by -
v = Δs / Δt
where,
v = velocity
Δs = change in position/displacement
Δt = change in time
The standard unit of velocity and speed both is m/s.
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an arctic weather balloon is filled with of helium gas inside a prep shed. the temperature inside the shed is . the balloon is then taken outside, where the temperature is . calculate the new volume of the balloon.
When the balloon is taken outside where the temperature is –9 °C, then the final volume becomes 19.3 L
From the question given above, the following data were obtained:
Initial volume (V₁) = 20.9 L
Initial temperature inside the shed (T₁) = 13 °C = 13 + 273 = 286 K
Final temperature inside the shed (T₂) = –9 °C = –9 + 273 = 264 K
As we know pressure remains constant so Pressure = constant
The final volume (V₂) =?
By using the Charles law equation, we can obtain the final volume i.e. V₂
[tex]\frac{V1}{T1}[/tex] = [tex]\frac{V2}{T2}[/tex]
[tex]\frac{20.9}{286}[/tex] = [tex]\frac{V2}{286}[/tex]
Now cross multiply both sides
V₂ × 286 = 20.9 × 264
V₂ × 286 = 5517.6
Divide by 286 on both sides of the equation
[tex]V_{2}[/tex] = [tex]\frac{5517.6}{286}[/tex]
V₂ = 19.3 L
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The complete question is:
An arctic weather balloon is filled with 20.9L of helium gas inside a prep shed. The temperature inside the shed is 13 degrees C. The balloon is then taken outside, where the temperature is -9 degrees C. Calculate the new volume of the balloon. You may assume the pressure on the balloon stays constant at exactly 1 atm. Round your answer to significant digits.
You have a solution that contains 100 ml of 1. 5 m potassium carbonate and another 100 ml solution that contains 1. 0 m fecl2 and 2. 0 m nabr. When you mix the two solutions together to form a precipitate. What is the precipitate and how much is formed assuming the insoluble product precipitates completely?.
Answer:
235
Explanation:
Given: 0.156M C2H4O260mL H2O4.17 pKaIn a NaOH and C2H4O2 titration
ANSWER
STEP-BY-STEP EXPLANATION
What is the group of Neon, and the family of it too?
The group of Neon is Group 8A and the family of it is noble gases or inert gases of the periodic table and includes helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn).
The term for these noble gas elements derives from their almost complete lack of reactivity with other elements or compounds. In reality, 1% of the atmosphere is made up of argon, which is present in the atmosphere in tiny proportions. Helium may also be found in natural gas reserves. The Group 8A elements are all colorless, odorless, monoatomic gases in their elemental state at ambient temperature.
Because the Group 8A elements contain a whole octet of eight valence electrons in their highest-energy orbitals ([tex]ns^{2}np^{6}[/tex]), they have a very low propensity to gain or lose electrons as covalent bonds allow atoms to exchange electrons to create ions or share electrons. Although it takes particular circumstances, they may be made to combine with other elements to produce compounds.
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Which of these is a measure of the average kinetic energy of the molecules
of a material?
O Option 1
O temperature
O thermal energy
O bonding energy
The measure of average kinetic energy of molecules is called tempreture.
What is kinetic energy ?
kinetic energy is a form of energy that an particle has by reason of it's motion.
If we want to accelerate an object then we must apply a force .
The average of all kinetic energy the molecule assumed to be directly proportional to the absolute tempreture of the gas.
The Kelvin tempreture of a substance is directly proportional to the average kinetic energy of the particles of the substance.
This is the reason why measure of the average kinetic energy of the molecule of a material called tempreture.
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Read this excerpt from Chapter 1 of Wheels of Change by Sue Macy.
Some attribute the breakthrough to Ernest Michaux, a French carriage maker, though others credit Pierre Lallement, who worked for him. At any rate, the new velocipede was propelled by pedals and cranks attached directly to the axel of the front wheel, which was slightly larger than the wheel behind it. Forward progress could be stopped or slowed by pedaling backward. However, with iron tires and only an ineffective steel spring under the seat to absorb bumps in the road, this velocipede was a challenge to ride. It quickly earned the nickname "boneshaker."
Which signal word(s) from the excerpt suggest a change of direction?
some
at any rate
forward progress
however
The word "however" from the passage from Sue Macy's book Wheels of Change denotes a shift in strategy. As a result, Option D is the appropriate statement.
What does Wheels of Change's theme entail?
The narrative "Wheels of Change" has as its central message that you should no longer be frightened to speak up for yourself and other people. This was demonstrated as girls' racing gained popularity.
Cycling has gotten more violent, and males have developed a strong concern about girls getting their rights. The Springfield Bicycle Club was established in 1881. While giving back to the community, Wheels of Change empowers citizens, boosts self-esteem, AND offers worthwhile transitional work. For $13/hour, Wheels of Change offers temporary jobs to people staying at the Temporary Bridge Shelter program run by Alpha Project.
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Complete each statement by writing the correct term or phrase from the list below
in the space provided.
abiotic factors
biotic factors
Interdependence
conformers
ecology
ecosystem
community
acclimation
1. Organisms that do not regulate their internal conditions to the environment are
habitat
herbivore
Osprey
2. An organism's change in response to a change in the organism's
environment
3. A(n)
aspects of its habitat, such as the soil, water, and weather.
4. The living organisms in a habitat are called
consists of a community and all the physical
5. 98% of this birds diet is fish
6. The dependence of every organism on its connections with other living and
nonliving parts of its environment
7. The many different species that live together in a habitat are called a(n)
8. The study of the interactions of living organisms with one another and with
their environment is called
9. Organisms that eat producers are called
10. The physical aspects of a habitat are called
11. The place where a particular population of a species lives is called its
Each statment correct phrase is completed.
1- Conformers are organisms that do not regulate their internal condition to the environment that habitat.
2- A change is an organisms surrounding that causes the organisms to react is called a stimulus.
3- soil,water and weather are abiotic factors of habitat.
4-An ecosystem consist of all the living organisms in an area.
6- ecology is the study of how organisms interact with one another and with their physical environment.
7-The many different species live together in a habitat are called a community.
8-ecology is the study of organisms and how they interact with the environment around them.
9-organisms that eat producers are called primary consumer.
10-The physical aspects of habitat are called abiotic factors.
11-A place where paticular population of species lives is called it's habitat.
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which solution is a buffer? which solution is a buffer? a solution that is 0.100 m in hno2 and 0.100 m in hcl a solution that is 0.100 m in hno2 and 0.100 m in nano2 a solution that is 0.100 m in hno3 and 0.100 m in nano3 a solution that is 0.100 m in hno2 and 0.100 m in nacl
The solution that is a buffer is a solution that is 0.100 M in HNO₂ and 0.100 M in NaNO₂ .
A weak acid and its conjugate base, or a weak base and its conjugate acid, must be combined to create a buffer solution. Only HNO2 (Weak Acid) and NaNO2 are included in the list as an acid and its conjugate base (Conjugate Base). Given that all concentrations are equivalent, the pH of this solution would be the same as the pKa of HNO2 (3,15).
Acids that don't entirely dissociate in solution are referred to as weak acids. In other words, any acid that is not a strong acid qualifies as a weak acid. The amount of dissociation determines how strong an acid is; the more dissociation, the stronger the acid.
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ELEMENT #3
The radius of my most common ion is larger than my atomic radius.
I have 6 valence electrons.
I have a higher first ionization energy than tellurium.
I am the smallest atom in my group.
What element am I? Write my symbol and standard electron configuration.
*dont have to give me the electron configuration i can find it
two chemicals a and b are combined to form a chemical c. the rate, or velocity, of the reaction is proportional to the product of the instantaneous amounts of a and b not converted to chemical c. initially, there are 100 grams of a and 50 grams of b, and for each gram of b, 2 grams of a is used. it is observed that 25 grams of c is formed in 7 minutes. how much is formed in 28 minutes? (round your answer to one decimal place.)
Answer:
A + B = C reaction decreases as time passes and the reactants get used up. r = -kAB during reaction A converts 2x while B converts x to form 3x of C let's say y = C y = 3x amount of reactants not converted yet , for A: 100 - 2x for B: 50 - x variatio
Explanation:
a commonly used biological buffer is a made from a weak acid/conjugate base pair called ""tris"". the pka for tris acid is 8.06. you have 1.00 liters of a solution where the concentration of tris acid (ha) is 0.200 m and the concentration of tris base (a-) is 0.150 m. what is the ph of the solution?
The pH of the solution is 7.94 if the concentration of the tris acid is 0.200m and the concentration of the conjugate base is 0.150m.
The pH of this buffer can be calculated using the Henderson-Hasselbalch equation according to which the pH is equal to the sum of the pKa value and the log of the concentration of conjugate base divided by the concentration of the weak acid.
This equation can be represented as;
pH = pKa + log ([conjugate base] ÷ [weak acid])
Substituting the given values into this equation to find the pH;
pH = 8.06 + log([0.150] ÷ [0.200])
pH = 8.06 + log(0.75)
pH = 8.06 + (-0.125)
pH = 7.94
Therefore the pH of this solution is calculated to be 7.94.
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At 7 a.m., the science classroom had a temperature of 68 F. By 3 p.m.,
the temperature had increased to 75 F. Calculate the rate of temperature
change from 7 a.m. to 3 p.m
The rate of temperature is the ratio of temperature difference to the difference in time. The rate of temperature for a change of 68 F to 75 F from 7 am to 3 pm is 0.625 F/hr.
What is temperature rate?Temperature is the measure of overall heat of a body or a region. Temperature level of a body or a place vary according to the time and some other factors such as pressure, seasonal changes such as rain, wind etc.
At morning to afternoon time the rate of temperature will be higher and to evening there might occur a slight decline.
Given that the time changes from 7 am to 3 pm thus, rate of time is 8 hrs. Then the temperature changes from, 68 faraday to 75 faraday thus the difference in temperature is 75-68= 5 faraday.
Now, the rate of temperature is calculated by taking the ratio of change in temperature to the change in time as follows:
(5 Faraday) / 8 hrs. = 0.625 F/hr.
Therefore, the rate of temperature change is 0.625 F/hr.
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Claim-evidence-reasoning: populations of organisms that reproduce asexually tend to show less variation from one individual to another. why might this be? make a claim and use your scientific reasoning skills to support your claim. cer claim: evidence: reasoning
Asexual reproduction prevents genetic variation within a species since it ensures that all offspring have an identical copy of the parent's DNA unless a mutation arises in the duplicate DNA that is produced.
Why is there no diversity in reproduction from a single parent?Sexual and asexual reproduction are the two options. In sexual reproduction, there are two parents. However, only one parent is engaged in asexual reproduction. In this, offspring of a single parent are genetically identical to the parent. Offspring are physically and genetically similar to their parents. They are a clone or exact replica of the parent. Asexual reproduction doesn't involve any genetic material being recombined.
Thus, the person created by asexual reproduction does not exhibit variety or genetic variability.
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A 1.25M solution of copper(III) sulfate is made with 670mL. How many grams of solute are required?
Molarity :
The number of moles of solute per liter of solution is known as molarity or molar concentration. It is used to express the concentration of a given solute in a solution.
It can be calculated using the formula, Molarity = [tex]\frac{number-of- moles-of-solute}{Volume-of-the-solution-in-liters}[/tex]
Given data:
Molarity of the solute, copper(III) sulfate = 1.25 M
Volume of the solution = 670 mL = 0.67 Liters
Then, Molar mass of the solute, = 415.2 g/mol
Then, number of moles of solute = Molarity x Volume of solution
= 1.25 x 0.67 = 0.8375 moles.
Then, Mass of the solute
= Molar mass of solute x number of moles of solute
= 415.2 g/mol x 0.8375 mol = 347.73 g.
Therefore, the mass of solute in grams required are = 347.73 g
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How did the Bronsted-Lowry acid-base theory clarify what Svante Arrhenius was not able to explain in his theory of acids and bases regarding ammonia?
The Bronsted-Lowry acid-base theory clarifies what Svante Arrhenius were not able to explain in their theory of acids and bases regarding ammonia as -
Svante Arrhenius theory states that -
In order for a substance to release H⁺ or OH⁻ ions, it must contain that very ion. But, this does not explain the weak base ammonia NH₃.
In Bronsted-Lowry acid-base theory -
Acids are the proton donating group while bases are the proton accepting group.
Ammonia is a nitrogen and hydrogen inorganic compound. Ammonia is a gas which is colourles, it is strong, and has a pungent smell. Its chemical formula is NH₃.
Ammonia is a stable binary hydride. It is the most basic nitrogen hydride. It is a typical nitrogenous waste, specifically among aquatic organisms. It contributes to the nutritional requirements of terrestrial organisms. It acts as a forerunner to 45 percent of the food and fertilizers all over the world.
70% of ammonia with urea and di-ammonium phosphate, is used to create fertilizers. It is available in a variety of shapes and compositions. The pure ammonia is spread onto the ground.
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8. In the lab, you are asked to prepare 150 mL of an 85 g/L solution and then use the original
solution to make 500 mL of a 50 g/L solution.
a) How much solute is needed to prepare the original solution? (Think: C = M/V)
b) How much of the original solution (mL) is needed to make the diluted solution?
For the original solution,
Concentration = 85g/L = 85g/1000ml
Required Volume = 150ml
(a)
Concentration = Mass/Volume
⇒ 85g/1000ml = Mass of the solute/150ml
⇒ Mass of the solute = 85 x 150/1000
⇒ Mass of the solute = 12.75 grams
Hence, 12.75 grams of the solute is required to prepare the original solution.
(b)
Now,
Concentration of the original solution = 85g/L = M1
Required concentration = 50g/L = M2
Final Volume = 500 ml = V2
Required Volume from the original solution = V1 =?
As we know,
M1V1 = M2V2
Hence,
85g/L x V1 = 500 ml x 50g/L
⇒ V1 = 500 X 50 / 85
⇒ V1 = 294.11 ml
Therefore, 294.11 ml of the original solution is required to make the diluted solution.
What is a Stock solution?A stock solution is a very potent mixture. These solutions are quite helpful since we may take a small amount of the stock solution and dilute it to the required concentration. These ready-to-use chemical reagents can be prepared quickly thanks to these stock solutions. It also aids in material conservation. As a result, just the amount of stock and solvent required for the dilution process is consumed when utilizing a stock solution to low-concentrated solution. Because we simply need to dilute the stock solution instead of preparing the solution using many reagents and complex procedures, it is also crucial to conserve storage space. Additionally, it enhances experiment accuracy.A chemical reagent is present in vast quantities as a stock solution. It has a uniform concentration. Examples of typical stock solutions in laboratories are sodium hydroxide and hydrochloric acid. These play a critical role in creating titration-related solution preparations.To learn more about the Stock solution, refer to:
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aqueous lithium hydroxide solution is used to purify air (remove co2) in spacecrafts and submarines. the pressure of carbon dioxide in a cabin having a volume of 2.4 x105 l is 7.9 x 10-3 atm at 39oc. eventually the pressure of co2 is reduced to 1.2 x 10-4 atm. how many grams of water are formed by this process? the ideal gas law and stoichiometry chp. 5.5 2lioh(aq) co2(g) à li2co3(aq) h2o(l)
The mass of the water is 1580 g.
What is the amount of water formed?We know that the ideal gas equation can be used to obtain the number of moles of the gas. We have been told that the pressure of the gas reduced from 7.9 x 10-3 atm to 1.2 x 10-4 atm. The change in pressure can be used obtain the number of moles.
Change in pressure = 7.9 x 10-3 - 1.2 x 10-4 = 7.78 * 10^-3 atm
Using;
PV = nRT
n = PV/RT
n = 7.78 * 10^-3 atm * 2.4 x10^5 l/0.082 * (39 + 273)
n = 85 moles
Since 1 mole of carbon dioxide produces 1 mole of water
85 moles of carbon dioxide produces 85 mole of water
Mass of water produced = 85 mole * 18 g/mol
= 1580 g
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A student measured the string as 2.43 m long. The teacher said it was actually 2.12 m long.
What was the student's percent error?
5. If a solution has a pOH of 2.5 what is its [OH
] concentration.
Answer:
3.2 x 10-3 3.2 x 10-12 3.2 x 10-2 11.5
Explanation:
7. This question is about calculating the area.
A nanoparticle is in the shape of a cuboid.
Calculate its surface area to volume ratio.
Show working.
a
a = 80 nm
b = 15mm
c = 20nm
C
Surface area to volume ratio:
In a parallel circuit with identical light bulbs, which of these is true? A A battery is not the source of voltage. B There is only one resistor, such as a light bulb. C The circuit is left open so that current cannot flow. D Adding more identical light bulbs will not change their brightness.
In a parallel circuit with identical light bulbs, the statement D is true. D Adding more identical light bulbs will not change their brightness.
A parallel circuit has two or more paths for modern to waft through. Voltage is equal across everything of the parallel circuit. The sum of the currents thru each route is equal to the entire modern that flows from the supply.
A parallel circuit has one feature: to preserve the power flowing while one pathway is interrupted. A top instance is mild furnishings that use more than one mild bulb. when an unmarried bulb within the fixture goes the light fixture maintains to operate.
In a chain circuit, the modern-day thru every one of the additives is the same, and the voltage across the circuit is the sum of the voltages throughout every issue. In a parallel circuit, the voltage across every one of the components is equal, and the total cutting edge is the sum of the currents via each element.
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How many of each element would you find in AI(NO3)3?
a. Aluminum : _________
b. Hydrogen : __________
c. Oxygen : _____________
Answer:
you will find 3 in aluminium
hydrogen should be b 3
and oxygen is 9
If the acetic acid being titrated here were replaced by hydrochloric acid, would the amount of base needed to reach the equivalence point change?.
yes, the equivalence point would change as acetic acid is a weak acid and dissociates partially but hydrochloric acid is a strong acid and dissociates completely.
Between equivalence and endpoint, what is the difference?Equivalence and endpoint differ primarily in that the former refers to the point at which a chemical reaction ends and the latter, to the time at which a system's color changes.
Define equivalence point.When enough titrant has been administered to entirely neutralize the analyte solution in a titration, this is known as the equivalence point. The titrant (standard solution) has a molecular weight that is equal to the moles of the solution with the unknown concentration.
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experimentally, it is found that 3.4 moles of a molecule in gaseous form requires the addition of 454 j of energy at constant volume in order to raise its temperature by 8.4 k. calculate the molar heat capacity at constant volume for this gas.
The molar heat capacity at a constant volume for this gas is 15.90 J/(K⋅mol) if 3.4 moles of this gas require 454 j of energy to raise its temperature by 8.4 k.
The molar heat capacity can be calculated by using the formula;
molar heat capacity = C / n
where C represents the heat capacity
n represents moles
The heat capacity of this gas can be calculated as follows;
heat capacity = E / T
here, E represents the amount of heat energy supplied
T represents the change in temperature
Substituting the given values in the heat capacity formula;
heat capacity = 454 / 8.4
heat capacity = 54.05
Now we substitute this calculated value of heat capacity in the formula of molar heat capacity;
molar heat capacity = C / n
molar heat capacity = 54.05 / 3.4
molar heat capacity = 15.90
Therefore, the molar heat capacity for this gas at constant volume is calculated to be 15.90 J/(K⋅mol).
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estimate the pressure necessary to melt water at −10ºc if the molar volume of liquid water is 18.01 ml and the molar volume of ice is 19.64 ml. the molar entropy change for this process, 22.04 j/k, remains constant with temperature.
If the molar volumes of liquid water and ice are 18.01 ml and 19.64 ml, respectively, then 1334 atm of pressure is required to melt ice at 10 C. 22.04 J/K is the entropy change process.
The term "molar" relates to the mole, which is the unit of concentration molarity and the number of moles in a liter of a solution. The phrase most frequently refers to the molar concentration of a solute in a solution in chemistry. The mol/L or M units of molar concentration are used. Molar also describes many molecular quantities including molar mass, molar heat capacity, and molar volume.
The most popular unit of measurement for molal concentration or molarity is moles of solute per liter of solution. It is defined as the amount of solute material per unit volume of solution, or per unit volume available to the species, and is denoted by the lowercase letter.
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whats the phycical property of water
Answer:
The answer is color, temperature, turbidity, taste, and odor.
Please answer most of the questions.
The statement one is incorrect because the elements in periodic table has some similarities between them they are not completely different from each other.
How come metals are reactive?The difference in stability between the electron configurations of metals as atoms and as ions is what causes metals to be reactive. Since they are all metals, when they interact, positive ions are produced.
The second statement is right and third statement is wrong because the most reactive group is group 1 or group 7 because group 1 wants to lose one electron to become stable and halogens want to gain one electron to become stable. Chlorine belongs to group 17 halogens , it is reactive.Krypton is noble gas it is very less reactive.Magnesium belongs to alkaline earth metal . Sodium , potassium and lithium are in one group that is alkali metals.Potassium caught fire easily so it is kept in kerosene , Sodium fizzed a lot and lithium fizzed bit.Ceisum would explode .To learn more about metals refer
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Which element does the "X" in
the isotope notation
represent?
14X
6
A. C
B. O
C. Si
D. N
The element whose isotope is represented as [tex]_{6}^{14}X[/tex] is carbon -14. The atomic number of carbon is 6 and the mass number for the given isotope is 14 amu.
What are isotopes?Isotopes are atoms of same element with different mass numbers. Isotopes slightly changes in chemical and physical properties between each other.
Almost elements in the periodic table are having isotopes. However not all of them are stable. Some of them for heavy metals are radioactive isotopes and are not stable.
The isotope is represented by showing mass number in top of the symbol and atomic number at the bottom. The atomic number 6 corresponds to carbon. Hence, option A is correct. Carbon -14 isotope is given here.
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