Additional Science: Chemistry Unit 2 Bonding and Calculations

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Atoms, Compounds and Isotopes

Atomic Number and Mass Number describe an atom. These two numbers tell you how many of each kind of particle an atom has. Particles are the smallest bits that make up something. The Mass Number - Total number of protons and neutrons. The Atomic Number - Number of protons.

1) Different elements will have different numbers of protons.

2) To get the


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