share two covalent bonds. have a definite shape. share a pair of neutrons. have two free electrons.
I gave my students this multiple choice question: The atoms that make up oxygen gas

Only one answer is correct among these 4 choices:
- share two covalent bonds.
- have a definite shape.
- share a pair of neutrons.
- have two free electrons.

Could you tell me which one is correct?

share two covalent bonds.