Ionic, covalent, and metallic bonds.
Substances with ionic bonds normally have a powdery or granular appearance. They also dissolve in water which can conduct electricity. They also conduct electricity as a liquid,mid it is melted. But it's hard to melt. As a solid it cannot conduct electricity. An example is salt.
Substances with covalent bonds have a powdery or granular appearance. They sometimes dissolve in water and sometimes do not. It's does melt. It does not conduct electricity for solids or liquids. It also doesn't dissolve in water. An example is sugar.
It has a shiny appearance, it doesn't dissolve. It does not easily dissolve. But it conducts electricity for solids and liquids. And it can't dissolve which means it doesn't conduct electricity. An example is copper