Why `AlF_3` is a high melting point solid while `AlCL_3` is low melting point volatile solid?

Melting point is higher for

Melting point is highest for

Which has the highest melting point ?

Stannous chloride has high melting point (is a solid) while stannic chloride has low melting point (is a liquid). Why?

Silica is high melting solid, because

Diamond has high melting point - Explain.

Why do ionic compounds have high melting points?

The following monoxide is a high melting solid