Answer:
1 molecule of oxygen has 2 atoms.
So 2,25 molecules of oxygen have 2 x 2,25 atoms.
2 x 2,25 = 4,5 atoms
There are 4,5 atoms in 2,25 molecules oxygen.
C seems to be the best answer
A=24
N(n)=13
N(p)=A-N(n)
N(p)=24-13=11
²⁴Na - sodium
atomic number is 11
I believe it’s b if not then I’m sorry
