Question

A solid has a high to very high melting point, great hardness , and poor electrical conduction, this is an_______solid.

Answer 1

A solid that has a high to very high melting point, great hardness, and poor electrical conduction is an : E. Ionic solid

Ionic solid consist of oppositely charge ions. One of the example of Ionic solid is salt (NaCl)

hope this helps

Answer 2

A solid has a high to very high melting point, great hardness , and poor electrical conduction, this is a covalent network solid.
A network solid is a chemical compound in which the atoms are bonded by covalent bonds.

d. covalent network