GCSE AQA CHEMISTRY C2 *Part 1*- Electronic structure of ions

1) SODIUM CHLORIDE: Na+ Cl-

Sodium (Metal)- 11 electrons [2,8,1] • Chlorine (Non-metal)- 17 electrons [2,8,7]

As chlorine has a nearly full outer shell it wants to gain an electron, whereas sodium has only one electron in its outer shell so it would want to lose it. So, sodium's electron is TRANSFERRED (not shared with, which is covalent bonding) to chlorine, forming sodium chloride, …