Particle Theory and Bonding

How much of the Earth is covered in water?

• 56%

• 65%

• 71%

• 76%

According to the kinetic particle theory, atoms and molecules move

__________________ when they are at warmer temperatures.

• slower

• faster

Which state of water molecules are pictured here?

• water vapor

• liquid water

• solid water (ice)

• steam

Electrons are found in __________ of an atom.

• the nucleus

• shells around the nucleus

The hydrogen atom (H) has ____ electron(s).

• 1

• 2

• 3

• 4

The oxygen atom has 8 electrons. How many are in the second shell?

• 2

• 4

• 6

• 8

H₂O is the chemical formula for ___________.

• carbon dioxide

• hydrogen peroxide

• hydroxide ions

• water

When hydrogen and oxygen combine to form water, what kind of bonding occurs?

• ionic bonding

• covalent bonding

• hydrogen bonding

• no bonding

Hydrogen and oxygen achieve stable electron configurations in the water molecule by ___________ electrons.

• sharing

• giving up

• taking

• giving and taking

Which of the following is NOT a salt found in the ocean?

• CO₂

• MgSO₄

• CaCO₃

• NaCl