Which one of the following is most likely to gain electrons when forming an ion? Al K
Cu
Br
Cr

Br

Explanation:

looking at all options:

Al = Al3+ + 3e-

K=K+ + e-

Cu = Cu2+ + 2e-

Br + 2e- = Br2-

Cr = Cr3+ + 3e-

answer is Br.

br

Explanation:

idk what the question is about

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