<span>3) P4O10 and P2O5
The mass of the P4O10 divided by the mass of the P2O5=2, and if you multiply the number of atoms in the P2O5 by 2, you get the P4O10, thus P2O5 is its empirical formula.</span>
They both have 1 electron in their valence shell.....
<span>The outer electrons are not as tightly bound as ones closer to the nucleus</span>
