Which Cl isotope should we use to get the atomic mass of the element Cl? A.)Both Cl-35 and Cl-37

B.)Cl-35 only

C.)Cl-37 only

i think it's B CI-35 only

Explanation:

hope this helps

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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