A portion of Period 3 in the Periodic Table is displayed. $\text{Na}\ \text{Mg}\ \text{Al}\ \text{Si}\ \text{P}\ \text{S}\ \text{Cl}\ \text{Ar}$ Which property increases as you move from left to right across Period 3?
- Adensity
- Bmelting point
- Cnon-metallic character
- Dthe number of electron shells