Question

Why are ionic compounds have usually high mp and high bp?

Answer 1

Ionic compounds have high electrostatic force of attraction between two elements that is why they have high melting and boiling point.

thanks for giving me a chance to answer you

Answer 2

$\boxed{\begin{array}{|c|c|c|c|} \Large\sf {Ionic\:Compounds} & \sf \Large {Chemical\:Formula} & \Large \sf{Melting\:point_{(k)}} & \Large\sf {Boiling\:point_{(k)}} \\ &&& \\ \sf Sodium\:Chloride & \sf NaCl & 1074 & 1686 \\ &&& \\ \sf Lithium\:Chloride & \sf \sf LiCl & 887 & 1600 \\ &&& \\ \sf Calcium\:Chloride & \sf CaCl_2 & 1045 & 1900 \\ &&& \\ \sf Calcium\:Oxide & \sf CaO & 2850 & 3120 \\ &&& \\ \sf Magnesium\:Chloride & \sf MgCl_2 & 981 & 1685 \\ &&& \\ \end{array}}$