Oxidation and Reduction Concepts

What happens to electrons during oxidation?

• They are gained.

• They are lost.

• They are shared.

• They are created.

What happens to electrons during reduction?

• They are lost.

• They are shared.

• They are gained.

• They are destroyed.

If an atom is very "electronegative," what does it tend to do with electrons in a chemical bond?

• It gives them away easily.

• It shares them equally with other atoms.

• It pulls electrons closer to itself.

• It does not have any electrons.

In the reaction where hydrogen (H2) and oxygen (O2) combine to make water (H2O), which element is oxidized?

• Oxygen

• Hydrogen

• Both oxygen and hydrogen

• Neither oxygen nor hydrogen

What happens when an atom goes through oxidation?

• It gains electrons

• It loses electrons

• It stays the same

• It changes its color

When hydrogen and oxygen combine to make water, what happens to the hydrogen?

• It gains electrons

• It loses electrons

• It becomes oxygen

• It disappears

What happens when an atom goes through reduction?

• It gains electrons

• It loses electrons

• It stays the same

• It changes its shape

When hydrogen and oxygen combine to make water, what happens to the oxygen?

• It gains electrons

• It loses electrons

• It becomes hydrogen

• It disappears