9) All elements can be sorted into 3 simple groups: O metals, meteors, meteorites
O metals, non-metals, metalloids
O medals, non-metals, meteorites

B) metals, non-metals, metalloids

An example of a metal is iron. A non-metal example is oxygen, which is a gas at STP (standard temperature and pressure).

A metalloid is a bit of a mix between a metal and non-metal element. It's sorta like an element that has both properties of metals and non-metals, or it's in a murky gray area. An example of a metalloid would be silicon.