describe the critical processes by which nitrogen is cycled through the biotic and abiotic components of earth’s ecosystems and identify the primary storage sink for nitrogen.

dynamic equilibrium is the answer.

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!

if you need further assistance, let me know: )

~ trueboss72

elements make up everything, and they combine to make compounds.

the answer is c