Which of the following is a physical property of nonmetals?
a. they are shiny
b. they are poor conductors of electricity
c. they are very strong in the solid form
d. they are all non-reactive elements

yes it is balanced

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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