Question

Explain how does the melting point change on moving from group-1 to group-2 in the periodic table?

Answer 1

The melting points is the amount of energy required to break a bond (s) to change the solid phase of a substance to a liquid.

Generally, stronger the bond between the atoms of an element, the more energy required to break that bond. Because temperature is directly proportional to energy, a high bond dissociation energy correlates to a high temperature.

Melting points are varied and do not generally form a distinguishable trend across the periodic table. However, metals generally possess a high melting point. Melting point increases on moving from group 1 to group 2 in the periodic table.