Answer first gets brainliest
1. h2o molecules temperatures drop below freezing.
a. bond
b. form crystals
c. create solids
d. all of the above
2. when the ice forms, the hydrogen atoms in a water molecule
a. bond with hydrogen atoms in other water molecules
b. bond together and release the oxygen atom into the air
c. bond with the oxygen atoms in other water molecules
d. combine to form a single, heavier hydrogen atom
3. why is ice less fence than liquid water?

1 is B

Explanation:

Ice is crystalline so when water drops below freezing it forms crystals, I don't know the rest.

1. D

2. C

3. Ice is less dense than water because the orientation of hydrogen bonds causes molecules to push farther apart, which lowers the density. More organized in the solid forms verse the liquid form.

Explanation:

1. When temperatures drop below freezing crystals are formed, and crystals = ice. Ice = solid and there are more bonds in ice than there are in water.

2. When ice forms the hydrogen atoms in a water molecule bond with the oxygen atoms in other water molecules.

the answer is d. 74.02

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.