Question

Why solid have high rigidity than liquid and gas?
Why solid are tightly packed

Answer 1

Answer:

Solids have high rigidity than liquids and gases because there atoms are tightly held by strong intermolecular forces where as the molecules of gases and liquids are loosely packed which in turn results to their being less rigid than the solids.

Explanation:

Answer 2

Solids conduct heat better than liquids, which are in turn better conductors than gases. The particles in a solid are most tightly bond and their positions are more or less fixed relative to each other (Fig. 5a). The force between adjacent particles is strong, making heat transfer by collision the most efficient.