When heat is added to a substance describe how the molecules are affected

This chart represents the melting point of several substance. what besy explains the high melting point of the salt?

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

What energy is it when you flip on a switch on a lamp