Question

Why is covalent compound pbr6 not possible?

Answer 1

Answer:

Therefore, molecular compounds usually have low melting and boiling points. Covalent compounds usually have lower enthalpies of fusion and vaporization than ionic compounds. The enthalpy of fusion is the amount of energy needed, at constant pressure, to melt one mole of a solid substance.

Answer 2

Answer:

Covalent compounds usually have lower enthalpies of fusion and vaporization than ionic compounds. The enthalpy of fusion is the amount of energy needed, at constant pressure, to melt one mole of a solid substance