A pure substance that cannot be broken down into anything else is a?

2 or more atoms chemically bonded together is a?

2 or more atoms of different elements chemically bonded together is a?

H2O is a?

O3 (Ozone) is a?

A compound can be chemically broken down into another substance

The atomic number is the number of ?

The protons plus the neutrons equals the?

The elements on the Periodic Table are arranged according to?

CO2 is made up of 2 elements, Carbon and Oxygen. It is a?

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