Answer:
dont know how to remove the answer read it wrong
I'm pretty sure the answer is 1. I and III
Due to it's electronic configuration w/c is 1s2 2s2 2ps 3s1 considering the last w/c is 3s1, sodium should be in row 3 period a1.
The answer will be
.
.
.
4.88 x 1023 molecules of O2
