Most metals share a lot of properties, such as being good conductors of heat and electricity. Non-metals often have the opposite properties. For example, they are usually poor conductors of heat ...

The metals in Group 1, such as lithium, sodium and potassium, are all soft. Many non-metals have low melting and boiling points. When non-metals are in a solid state, they are usually brittle so ...

As parents, the last thing we want is for our kids to be exposed to anything harmful ... that concern for parents across the country. Heavy metals such as lead, cadmium, and arsenic are present ...