Which statements correctly describe compounds? check all that apply. -compounds can be broken down into simpler substances by chemical means. -each compound is composed of one type of molecule. -compounds can be broken down into simpler substances by physical means. -each compound is composed of one type of atom. -each compound is composed of two or more types of atoms. -compounds cannot be broken down into simpler substances by chemical means.

Compounds can be broken down into simpler substances by chemical means.

Each compound is composed of two or more types of atoms

Explanation:

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each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.