What group on the Periodic Table contains the elements of the alkaline
earth family?
Answers
Answer:
The alkaline earth metals are six chemical elements in group 2 of the periodic table. They are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).
Explanation:
hope that helps
Related Questions
Can someone please help me answer these 2 questions
Answers
Answer:
Days of the week are arranged in rows from left to right
Mondays in a Month are arranged in columns from top to bottom
Explanation:
C3H8 + 502 -->3 CO2 + 4H20 In the equation, what is the mole ratio of reactants?
Answers
19. The reaction 2NOBr (g) → 2 NO (g) + Br2 (g) is a second-order reaction with a rate constant of 0.80 M-1s-1 at 11 °C. If the initial concentration of NOBr is 0.0440 M, the concentration of NOBr after 6.0 seconds is ________. A) 0.0276 M B) 0.0324 M C) 0.0363 M D) 0.0348 M E) 0.0402 M
Answers
Answer:
(C)The concentration of NOBr after 6 seconds is 0.0363
Explanation:
The second order equation is given by
[tex]\frac{1}{R} = KT+\frac{1}{Ro}[/tex]
k= rate constant= 0.8[tex]M^-1s^-1[/tex]
T= time = 6s
Ro= initial concentration = 0.044
[tex]\frac{1}{R}[/tex] = 0.8*6+ [tex]\frac{1}{0.044}[/tex]
[tex]\frac{1}{R}[/tex] = 27.53
R= 1/27.53 = 0.0363
The salts you tested were held together by ionic bonds. The compounds were made of two types of ions, positive and negative, that were attracted to each other because of their opposite charges. Some ionic bonds take more energy to break. Based on your investigation, which compounds have bonds that require the most energy to break?
A.
an ionic compound that completely dissolves in water, forming many ions
B.
an ionic compound that partially dissolves in water, forming some ions
C.
an ionic compound that does not dissolve in water, and thus does not form any ions
Answers
C. an ionic compound that does not dissolve in water, and thus does not form any ions.
Water breaks the ionic bond by hydrogen bonding, as, water itself has a more ionic bond and is polar in nature. Many other solvents such as kerosene and petrol are not capable of breaking the ionic bond. Hence, can not dissolve them, and they all have covalent bonds and which are non-polar in nature.The strength of a single covalent bond requires more energy to break than a single ionic bond. The weakest of the intramolecular bonds or chemical bonds is the ionic bond.Therefore, more energy is required to break the an ionic compound that does not dissolve in water since it will not have the ionic bonds in it.
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What first happens When a star begins to run out of fuel
Answers
Answer: The star's core shrinks, and it becomes a white dwarf.
A balloon moves vertically upward at
5 m/s. This is an example of ?
A.speed
B. Velocity
C. Acceleration
D.Velocity and acceleration
Answers
Answer:
B. Velocity
Explanation:
The answer is Velocity because the def of velocity is the rate of constant speed in a given direction. I hope this helps, have a good night.
two students are working together to build a birdhouse. Student 1 applies a force of 10 N to a wooden board in order to slide it across the table to student 2. If the force of fraction resisting the student ´s push is 4 N, what is the net force acting on the board?
Answers
Answer:
6
Explanation:
if there is 10n and the friction is 4n on the table then it is 6n.
i hope this helps you! :)
Which metal would form a stronger metallic bond?
A.sodium
B.tungsten
C.strontium
D.lithium
Answers
Answer:
c
Explanation:
Which temperature represents the highest average kinetic energy of the particles in a sample of matter?
Answers
Answer:
41 Which temperature represents the highest average kinetic energy of the particles in a sample of matter? (1) 298 K (3) 27°C (2) 267 K (4) 12°C
Explanation:
highest average kinetic energy highest temperature
Answer:
the answer is 27
Explanation:
What helps skin repair itself after it is cut?
Question 6 options:
interphase
photosynthesis
mitosis
Answers
Answer:
The answer is mitosis.
Explanation:
plzzz help me i promise will mark u brainiest
Answers
Answer:
d) water
Explanation:
Answer:
C) sodium chloride
what is the
formula and valency of
thiosulphate
Answers
What does it mean if an element has no subscript in a chemical formula?
A. There are an uncertain number of atoms of that element in the
molecule.
B. The number of atoms of that element in the molecule can vary.
C. There is one atom of that element in the molecule.
D. There are no atoms of that element in the molecule.
Answers
there is one atom of that element in the molecule
A rock that has a mass if 180 grams dropped in a graduated cylinder that was originally filled to 52ml; it now reads 62ml. What is the density of this object
Answers
Answer:
18 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
volume = final volume of water - initial volume of water
volume = 62 - 52 = 10 mL
From the question we have
[tex]density = \frac{180}{10} \\ [/tex]
We have the final answer as
18 g/mLHope this helps you
A résumé should include your date of birth. True O False
Answers
Answer:
True a resume should i.
Answer:
The answer is false on edg
The piece of metal is magnetic
Answers
Answer:
Explanation:
Magnetic materials are always made of metal, but not all metals are magnetic. Iron is magnetic, so any metal with iron in it will be attracted to a magnet. Steel contains iron, so a steel paperclip will be attracted to a magnet too. Most other metals, for example aluminium, copper and gold, are NOT magnetic.
Why is gunshot residue important for a forensic scientist? What are the potential complications with this type of evidence?
FORENSICS
Answers
Answer:
Gunshot residue is important to forensic scientists because it can help measure the firing distance of a weapon, or if someone has fired a weapon lately based on what's on their hands. The potential complications of this evidence include it being uncertain if the residue is from another firing. This type of evidence can also be uncertain in a courtroom when firing distance is drawn into question.
Explanation:
what is a solution of zinc and copper?? PLS HELP
five letter word
Answers
CUSO4)
Explanation: cashing ion redox Copper sulfate solution. Reaction of zinc metal in copper sulfate solution. The process that occurs in this redox reaction is shown below as two separate half-reactions, which can then be combined into the full redox reaction.
Which body parts don’t fossilize because animals tend to consume them?
A.
bones
B.
muscles
C.
shells
D.
teeth
Answers
Answer:
b. muscles is the answer
Explanation:
muscles is a meat, animals eat meat
__ has mass and takes up ____ i need help pls
Answers
Answer:
Matter has mass and takes up space.
Explanation:
Matter is everything around you. Atoms and compounds are all made of very small parts of matter.
Mass is a measure of the amount of matter in an object.
Which of the elements below has the largest electronegativity? Na, Mg, S, P?
HURRY!!!
Answers
Answer:
Electronegativities generally decrease from top to bottom within a group due to the larger atomic size.
Of the main group elements, fluorine has the highest electronegativity (EN= 4.0) and cesium the lowest (EN=0.79).
Explanation:
Sulfur has the largest electronegative element. Therefore, option C is correct.
What is electronegativity?Electronegativity is a measure of an atom's ability to attract electrons toward itself in a covalent bond, and it generally increases as you move across a period from left to right in the periodic table.
The type of bond that exists between atoms will depend on the electronegativity of the system.
Out of the given elements, S (sulfur) has the largest electronegativity. Sulfur has an electronegativity value of 2.58 on the Pauling scale, while Na (sodium) has an electronegativity value of 0.93, Mg (magnesium) has an electronegativity value of 1.31, and P (phosphorus) has an electronegativity value of 2.19. Therefore, option C is correct.
Learn more about electronegativity, here:
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Please help me vote you brainiest
Answers
Answer:
If two forces act on an object in the same direction, the net force is equal to the sum of the two forces. This always results in a stronger force than either of the individual forces alone
A popular radio station broadcasts with a frequency of 94.7 MHz. What is the
wavelength of the broadcast? (1 MHz = 1x106 Hz).
Answers
Answer:
λ = 0.032×10² m
Explanation:
Given data:
Frequency of broadcasts = 94.7 MHz
Wavelength of broadcasts = ?
Solution:
Frequency of broadcasts = 94.7× 10⁶ Hz
Formula:
Speed of wave = frequency × wavelength
3×10⁸ m/s = 94.7× 10⁶ Hz × λ
λ = 3×10⁸ m/s /94.7× 10⁶ Hz
Hz = 1/s
λ = 0.032×10² m
Answer: FM: 3.17m Am: 3.66m
Explanation:
Find the number of moles of water that can be formed if you have 154 mol of hydrogen gas and 72 mol of oxygen gas.
Answers
Answer:
The answer is 144 mol.
Explanation:
"72 mol of oxygen will form only 144 mol of water, and 10 mol of hydrogen remain in excess, so the limiting reactant is oxygen and hydrogen is in excess."
Which of the following has potential energy? (A child swinging on a play set a book on a table a ball rolling down a hill a car driving down the road)
Answers
Answer:
book on a table
Explanation:
potential energy is stored energy
also mark brainliest
Answer:
A child Swinging on a play
Explanation:
Because The potential Energy is about doing something The Defference about Kinetic Energy are A Things That not move before you moved it
Which of the following elements is not a diatomic molecule?
O carbon
O nitrogen
O chlorine
O hydrogen
Answers
Diatomic elements are pure elements that form molecules consisting of two atoms bonded together.
Diatomic elements: hydrogen, nitrogen, oxygen, fluorine, chlorine, iodine, bromine.
So “Carbon” is not a diatomic molecule!!
Hope this helps you!!:))
Is party mix a example of a mixture
Answers
Answer/Explanation:
Yes a party mix is an example of a mixture. Hence, the word party MIX. To be more specific it is a heterogenous mixture because its components are not evenly separated through out the substance.
A triple bond has _____
shared electrons.
8
4
2
6
Answers
Answer:
8
Explanation:
6
Explanation:
A triple bond in chemistry is a chemical bond between two atoms involving six bonding electrons instead of the usual two in a covalent single bond.
Which statement is true about covalent AND ionic bonds?
1. Covalent bonds share their valence electrons, while ionic bonds transfer electrons between atoms
2. Covalent transfer electrons between atoms while ionic bonds shares electrons
3. Both covalent and ionic bonds form new compounds by sharing electrons between atoms
4. Both covalent and ionic bonds form new compounds by transferring electrons between atoms
Answers
Answer:
1
Explanation:
ionic is transfer of electrons from metal to non metal while covalent is sharing electrons between two non metals
Answer:
It would have to be the first one
Explanation:
What is the empirical formula of a molecule containing 24% carbon (C), 6%
hydrogen (H), and 70% chlorine (CI)?
O A. CH3C1
B. C2H6Cl2
C. C24H6C170
O D. CHCI
SUBMIT
Answers
Answer:
Empirical formula is CH₃Cl.
Explanation:
Given data:
Percentage of hydrogen = 6%
Percentage of carbon = 24%
Percentage of chlorine= 70%
Empirical formula = ?
Solution:
Number of gram atoms of H = 6/ 1 = 6
Number of gram atoms of C = 24 /12= 2
Number of gram atoms of Cl = 70/ 35.45 = 2
Atomic ratio:
C : H : Cl
2/2 : 6/2 : 2/2
1 : 3 : 1
C : H : Cl = 1 : 3 : 1
Empirical formula is CH₃Cl.
Answer:
CH3Cl
Explanation:
a-p-e-x