If you put 100 carbon atoms in a box. How many carbon atoms remain after 2 half-lives or 11460 years?
100 atoms
50 atoms
25 atoms
12 atoms

25 atoms will remain after 2 half years or 11460 years

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.

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