As the n level increases, the energy and thus the levels are blank each other. Therefore, the transition would have a greater energy difference than the transition from

- both b and d.

-since b and d are the closest coastlines then that makes it the most affected.

< 3

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

c. 4.54 x 10–12 j happens to be correct