Question

the simplest chemical substances are composed of only_____type(s) of atom. 0 1 2 3

Explanation:

The simplest chemical substances are elements. By definition, an element is a pure substance that is made up of only one type of atom. For example, oxygen (\(O_2\)) is made of oxygen atoms, and gold (\(Au\)) is made of gold atoms. If there were 0 types of atoms, there would be no substance. If there were 2 or 3 types of atoms, it would be a compound (for 2 or more different types of atoms chemically combined) or a mixture (for 2 or more types of atoms just physically together, not chemically combined).

Answer:

1