Which is the electron configuration for bromine? DO
O 1s22s22p3s23p64s23d104p5
O 1s22s22p 3s23p64s23d104p6
O 1s22s22p3s23p44s23d104p5
O 1s²2s22p63s23p64s23dº4p5

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

16

explanation:

the marks go by 4s