Assume you have a sealed jug that only contains air. if you heat the air in the jug it will have a higher temperature. what are other properties of air will change?
a: air volume
b: air density
c: air composition
d: air pressure

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