How does melting point and boiling point relate to bond type?

i think :

All ionic compounds have a high melting point and boiling point because many strong ionic bonds need to be broken. They conduct when molten or in solution as the ions are free to move. They can be broken down by electrolysis. They are generally soluble in water

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).

the formula for the conversion of temperature from degree celsius to kelvin is:

the sample of water at is converted to kelvin temperature by using the above formula as:

on comparing the two samples of water at or we can say that at and at respectively. the difference between the temperatures of two samples of water is:

hence, one can say that the sample of water at is greater than the sample of water at by .