For the Period 3 elements from phosphorus to argon, the table lists these melting points: P $317\,\text{K}$, S $392\,\text{K}$, Cl $172\,\text{K}$, Ar $84\,\text{K}$. Which factor is responsible for the changes in melting points from phosphorus to argon?
- Athe changes in electronegativity from phosphorus to argon
- Bthe changes in first ionisation energy from phosphorus to argon
- Cthe increase in the number of electrons in each atom from phosphorus to argon
- Dthe number of atoms in each molecule of the element from phosphorus to argon