Question

Based on Coulombic forces, which of the following will have the highest melting point?

• A. Sodium
• B. Magnesium
• C. Zinc
• D. Aluminum

Answer 1

The correct option is D Aluminum

Based on coulombic forces $Al$ will be having highest melting point, as force is directly proportional to the charge carried and $Al$ can carry a charge off $+3$ which his highest among the given elements, hence have high melting point.

More cationic charge$⟶$ Number of $e^{-}<$ Number of protons

Thereby the attraction power increases and hence melting point increases.