In order to change a solid to a liquid or a liquid to a gas, what is needed?

A high melting point.
A high boiling point.
A decrease in thermal energy.
An increase in thermal energy

An increase in thermal energy

Explanation:

I got it right on the quiz.

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

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~ trueboss72