How many valence electrons are in Lithium
Answer:
Por ejemplo, el Litio se ubica en el grupo 1A, entonces tiene 1 electrón de valencia.
Explanation
Excepto los grupos 3-12 (los metales de transición), el dígito de las unidades del número de grupo identifica cuántos electrones de valencia se pueden asociar con un átomo neutro de un elemento listado en dicha columna.E
Help pls. Are they a pure substance or mixture?
Answer:
Pizza is difintly a mixture the other i have no idea..im pretty sure CO2 is a substance btw im sorry I wish I could help more Hope this helps! :)
Explanation:
Answer:
Mixture
?
Pure
Pure
Pure
Pure
Mixture
Mixture
Pure
Pure
Mixture
Pure
Explanation:The answers are on google. Im not sure what they mean by hunter.
Calculate the wavelength of radiation with a frequency of 7.13 x 1020 s-1
Answer:
λ = 4.2x10^-13 m
Explanation:
c = λν
c is speed of light 3x10^8 m/s
λ is wavelength
ν is frequency
3.10^8 = λ . 7.13 × 10^20
λ = 4.2x10^-13 m
How do changes in wind currents affect the short-term climate in a region?
Prevailing winds can cause a milder climate with heavy rain.
Global winds can cause a longer summer.
Prevailing winds can cause heavy rains or a dry climate.
Global winds can cause a longer winter.
Answer:
a
Explanation:
Prevailing winds can cause a milder climate with heavy rain is the change that affects the short-term climate in a region, hence option A is correct.
What is wind currents?Concentrated areas of winds are known as air currents. They primarily result from variations in the temperature or atmospheric pressure.
The horizontal and vertical currents are present at the mesoscale, whereas horizontal currents predominate at the synoptic scale.
A region's short-term climate can be dramatically impacted by changes in wind currents. As they move moisture from one place to another, prevailing winds can result in a milder climate with heavy rain.
As a result, the impacted area may see higher precipitation and a more temperate environment.
Therefore, prevailing winds can cause a milder climate with heavy rain can impact the short-term climate in a region.
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carol accidentally dropped a container of salt and sodium chloride, into a container of a dark grey metal. carol is pretty sure that the gray metal is iron fillings. using the table above, help carol seperate the two substances
Explanation:
The best way to separate the mixture is by using a bar magnet. We explore the magnetic property of the iron fillings in the mixture to separate it out.
The mixture is spread out thinly on a flat surface. A bar magnet is hovered above the spread of the mixtureThe magnet attracts the iron fillings to itself This will leave the salt behind in the mixture.WILL GIVE BRAINLIEST Pam and Caroline determined the mass and volume of a piece of metal to be 34.16 g and 11.3 mL respectively. Determine the density of the metal. (Please show work and use significant figures.
Answer:
0.303kg/m
Explanation:
Density=m/v where m is mass
and v is volume
we then convert m in grams to kg
= 34.16/1000
=0.0342kg
converting ml to m
=11.3/100
=0.113m
then density=0.0342/0.113
=0.303kg/m
What is the mass of oxygen in 230 g of sulfurous acid, H2SO3? (With solving pleaseee)
Answer:
Hi. U should do like this
Which ion has smaller size and why?Mg++ or Na+.
Answer:
Explain your answer. mg2+ would be the smaller ion this is because each ion has the same number of electrons however mg2+ has a greater number of protons and therefore is more charge dense and the outer electrons feel a greater pull from the nucleus.
Hope this helps, have a great day/night, and stay safe!
7
Select the correct answer.
Which quantity is a graduated cylinder designed for measuring?
O A. length
ОВ.
mass
O C. temperature
D.
time
O E. volume
my song, you hate me
yeah, lately i was feeling that you hate me its ok though cause i know
yeah, am i in a dream am i awake i cant tell because i feel im about to break
i know im a mistake all i ever ask for is for gods sake i dont apologize because what difference what it make i had all those chances that i did not take
its all my fault i got to behave im trapped in a cage i got to lose all the bad stuff and get in shape all i have to do now is give and take all those things that i said about drowning
in a lake its just hard to replace when you have so much to say to her face i still remember that when she taught me how to tie my shoe lace
yeah, i just want to be the better person the better version im not even learning and that is for certain im in flames im burning and inside im hurting but now i hope i will learn my lesson
Answer:
cool
Explanation:
Answer: I'm sensing depressed vibes... you okay?
Explanation: Your song's nice tho c:
Express the measurement using the appropriate SI prefix. 2.50 x 10-3g
Hi can someone help me answer this!
Compounds are combinations of elements. The combination of those elements is specific to the compound. Some compounds have the exact same elements but in different amounts. Look at C6H12O6, which you hopefully recognize as glucose (think cellular respiration and photosynthesis. But ribose is a 5 carbon sugar and its formula is C5H10O5, which you hopefully recognize (think RNA). They both have the same elements, but have different numbers of each element (sugars all have the 1:2:1 ratio). When you're looking at a formula, it's wise to look for the capital letters. That indicates when a different element is present. For glucose, there's a capital C - carbon, a capital H - hydrogen, and a capital O - oxygen. Behind elements, the subscripts help indicate the number of each element that's present. In glucose, there are 6 carbons, 12 hydrogens, and 6 oxygens. How many carbons, hydrogens, and oxygens does ribose have in its formula?
Question 4 options:
5, 12, 5
1, 2, 1
5, 10, 5
6, 12, 6
Explanation:
Omg How Am I supposed to get the answer tell me what to do
How many moles of Oxygen are in 1 mile of CaCo3?
[tex]\huge\boxed{3moles}[/tex]
_____________________________________Compound:The compound given in the question is [tex]CaCO_{3}[/tex] which is called Calcium Carbonate. A 1 mole of Calcium Carbonate has,
1 Moles of Calcium.
1 Moles of Carbon.
3 Moles of Oxygen.
_____________________________________Question:In the Question, It is asked that how many moles are present in the 1 mole of Calcium Carbonate, So as per information we have, there are 3 moles of oxygen present in Calcium Carbonate.
__________________________________________________________
Much simpler way to understand why there are 3 mole is look at the subscript along the element. There is no number in the subscript of Calcium and Carbon thus 1 Mole, There is 3 present in the subscript thus 3 moles of calcium. Remember that subscript suggests the number of moles of an element in only 1 MOLE OF COMPOUND
_____________________________________Best Regards,'Borz'
A sample substance has the chemical formula:
H2CO3
One molecule of the sample contains -
Two different elements with atomic numbers 1 and 27
Two different elements with atomic numbers 1, 6, and 8
Two different elements with atomic numbers 2 and 29
Two different elements with atomic numbers 2, 8 and 20
Answer:
1,6,8
Explanation:
Periodic Table- H=1.C=6,O=8
Hydrogen is H, Carbon is C, Oxygen is O
One molecule of the sample contains three different elements with atomic numbers 1,6 and 8.
What is an element?Element is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.
Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.
The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.Each element has its own characteristic property.
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Your question is incomplete, but most probably your full question was,a sample substance has the chemical formula:
H2CO3
One molecule of the sample contains -
Two different elements with atomic numbers 1 and 27
Two different elements with atomic numbers 1, 6, and 8
Two different elements with atomic numbers 2 and 29
Two different elements with atomic numbers 2, 8 and 20
Three different elements with atomic numbers 1,6 and 8
How much heat is absorbed when 15.0 g of liquid water is
heated until the temperature increases by 6.0°C? The specific
heat of liquid water is 4.18 J/gºC.
Answer:
376.56
Explanation:
using the formula q=mcΔT, where m=15g, C=4.18J/g°C and ΔT=6.0°C
Write the number of atoms and name of each element in each chemical formula. Use the periodic table
in Canvas for assistance or you may Google Periodic Table.
(Example: CuNO3 - Copper + 3 oxygen
Hi can someone please help me ? I’ll give you brainlest I just started 6th grade I really need help
Explanation:
Sugar=12 carbon+22 Hydrogen+11 oxygen
marble =Calcium+Carbon×3 oxygen
Natural gas=Nitrogen +4 Hydrogen
Rubbing Alcohol=3 carbon +8 Hydrogen+Oxygen
Glass=Silicon +2 oxygen
Answer:
12 Carbon + 22 Hydrogen + 11 Oxygen
Calcium + Carbon + 3 Oxygen
Carbon + 4 Hydrogen
3 Carbon + 8 Hydrogen + Oxygen
SIlicon + 2 Oxygen
Explanation:
Can I have brainliest? TYSMMMMMMMMMMMMMMMMm
if u want to sign a form and u meet your subject teacher to sign his subject and he tells you to write an undertaking what will you write . You will have to write your address and his address, you have to write heading, body of the letter and salutation.
you would have to kn
why is water being on the moon important?
Answer:
In order for people to survive, we need water. If we wanted to live on the moon, we would need water.
Answer:
Gravity
Explanation:
So water on the moon turns into fine ice dust, when you pour it.
guess wat Ytuber this is from
"hey guys its joe aka a mothers disappointment."
Answer:
Itlolk
Explanation:
Un estudiante de noveno año decide realizar varias mezclas de compuestos quimicos y tiene un frasco rotulado con la formula quimica: MgO ¿cual es el nombre del compuesto?
Answer:
- Oxido de magnesio
Explanation:
Mg → magnesio
O → oxígeno
La unión del oxígeno (no metal) con un metal, forma el determinado óxido que se nombra como óxido de .... y el no metal.
En este caso, podemos deducir que el contenido del frasco es de óxido de magnesio, aunque viendo que hay un sólo átomo de oxígeno podemos llamarlo como monóxido de magnesio, similar al CO (monóxido de carbono).
A partir de que el magnesio sólido entre en contacto con el aire, se produce MgO de acuerdo a la siguiente reacción:
2Mg + O₂ → 2MgO
Sucrose is an organic compound made by plants for quick energy. What type of organic compound is sucrose?
1-protein
2-carbohydrate
3-lipid
4-nucleic acid
Answer:
2-carbohydrate
Explanation:
Sucrose belongs to the carbohydrate family. It is a disaccharide which is derived from the condensation of glucose and fructose.
In the body, they are sources of energy for living processes. Upon hydrolysis such disaccharide produces tow monosaccharide units. Food substances that are energy rich will contain some of these organic molecules.Sucrose is a specific type of organic compound classified as a carbohydrate and the correct option is option 2.
Carbohydrates are essential biomolecules made up of carbon, hydrogen, and oxygen atoms. Sucrose, also known as table sugar, is a disaccharide formed by the chemical bonding of one glucose molecule and one fructose molecule.
Plants produce sucrose through photosynthesis and use it as a readily available source of energy. When consumed by animals, including humans, sucrose is broken down into its constituent monosaccharides to provide fuel for various cellular processes.
Thus, the ideal selection is option 2.
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What is the relishing hip between the chemical energy provided by the battery and the electrical energy produced according to the law of conservation of energy
Answer:
Equal
Explanation:
Energy is always conserved in the nature and it is an universal law. According to the law conservation of energy, it is said that energy can never be created out of something and we can never destroy and vanish any energy in any form. Energy in any form can only be transformed to some other forms of energy. This is known as conversion of energy.
In the context, the chemical energy that is produced by the battery and the electrical energy produced should be equal.
Match the word on the left with the definition on the right.
____ black dwarf e. star left at the core of a planetary nebula
____ white dwarf g. a red super giant star explodes
____ nebula c. what a medium-mass star becomes at the end of its life
____ protostar b. a large cloud of gas or dust in space
____ supernova a. exerts such a strong gravitational pull that no light escapes
____ neutron star d. the earliest stage of a star ’s life
____ black hole f. the remains of a high mass star
Answer:
Black dwarf- C
white dwarf- F
nebula- B
protostar-D
supernova-G
black hole-A
An electron jumps down from the fourth energy level to the first energy level and releases a light wave of 10.8 nm in wavelength. Determine the energy level value for the fourth energy level for the atom
Answer:
-20.2 * 10^-18 J
Explanation:
From;
E = hc/λ
h= planks constant = 6.6 * 10^-34 Js
c= speed of light = 3 * 10^8 ms-1
λ = wavelength = 10.8 * 10^-9 m
Substituting values;
E = 6.6 * 10^-34 * 3 * 10^8/ 10.8 * 10^-9
ΔE = -1.8 * 10^-17 J
But for ground state E1=−13.6eV or -2.176 * 10^-18 J
From;
ΔE = E4 - E1
E4 = ΔE + E1
E4 = (-1.8 * 10^-17) + (-2. 176* 10^-18)
E4 = -20.2 * 10^-18 J
agree or disagree that a scientific theory can be modified provide evidence along!!!!!!!
Answer:
I agree.
Explanation:
Arrange the elements in order of increasing ionization energy. Use the
periodic table to identify their positions on the table.
Drag each tile to the correct box.
Hola
Tiles
chlorine
fluorine
gallium
phosphorus
Sequence
Answer:
Gallium, Phosphorus, Chlorine, Fluorine
Explanation:
Arrange the elements in order of increasing ionization energy. Use the periodic table to identify their positions on the table.
Drag each tile to the correct box.
Tiles
chlorinefluorinegalliumphosphorus
Sequence
Atoms of different element can not have same atomic number because only same type of atoms combine to form element. Atoms belonging to different element can have different atomic number. Therefore, the element arranged in order of increasing ionization energy are Gallium, Phosphorus, Chlorine, Fluorine.
What is element?Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same. Two or more than two atoms with different physical or chemical properties can not combine together to form an element.
For neutral atoms, ionization energy is positive, indicating that ionization is indeed an endothermic process. The higher the ionization energy of an atom, roughly speaking, the nearer the outer electrons are to nucleus. The element arranged in order of increasing ionization energy are Gallium, Phosphorus, Chlorine, Fluorine.
Therefore, the element arranged in order of increasing ionization energy are Gallium, Phosphorus, Chlorine, Fluorine.
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Which orbital diagram is the most stable?
A. 1s ↑↓ 2s ↑↓ 2p ↑↓ ↑↓ ↑
B. 1s ↑↓ 2s ↑↓ 2p ↑↓ ↑↓ ↑↓ 3s ↑↓ 3p ↑↓ ↑↓ ↑↓ 4s ↑↓ 3d ↑ ↑ ↑ ↑ ↑
C. 1s ↑↓ 2s ↑↓ 2p ↑↓ ↑↓ ↑↓ 3s ↑↓ 3p ↑ ↑ ↑
D. 1s ↑↓ 2s ↑↓ 2p ↑↓ ↑↓ ↑↓
E. 1s ↑↓ 2s ↑ 2p 3s 3p ↑
F. 1s ↑↓ 2s ↑↓ 2p ↑↓ ↑↓ ↑↓ 3s ↑↓ 3p ↑↓ ↑ ↑
Answer:
D
Explanation:
Because sub-shell p have maximum no. of electrons I. E. 6
How is kinetic energy of particles and temperature related
Answer:
The higher the temperature, the faster the particles move, the lower the temperature, the slower.
In the periodic table hydrogen is placed in Group 1A (group 1) and helium is placed in Group 8A (group 18). The most likely reason for this is:
Answer:
This question appears incomplete
Explanation:
This question appears incomplete because of the absence of options. However, hydrogen is placed in group 1 because it has just one electron in it's outermost shell (which happens to be the only shell it has) just like every other group 1A/group 1 element. While helium is placed in group 8A/group 18 because it has a completely filled outermost shell (which is also the only shell it has) just like every other element in group 8A/group 18.
In the periodic table hydrogen is placed in Group 1A (group 1) and helium is placed in Group 8A (group 18). The most likely reason for this is configuration, energy level and properties.
Hydrogen is located in group 1 of the periodic table, although its electronic configuration is 1s¹ and its properties do not correspond to those of the alkali metals of that group. But in its electronic configuration you can see that it has only one electron in its outermost shell (which turns out to be the only shell it has), just like any other element of group 1A /group 1, so it is located in that group.
On the other hand, although the electronic configuration of helium is 1s², this element does not appear in group 2 of the periodic table of elements, but is placed in group 18. This is because it has the energy level complete, so it has the properties of a noble gas, that is, it is inert (it does not react), and it is a colorless and odorless monatomic gas.
In summary, in the periodic table hydrogen is placed in Group 1A (group 1) and helium is placed in Group 8A (group 18). The most likely reason for this is configuration, energy level and properties.
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