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GLOSSARY OF USEFUL TERMS FOR UNIT 1

Topic 1.1

Atomic number: the number of protons in the nucleus of an atom

Mass number: the total number of protons and neutrons in the nucleus of an atom

Isotopes: atoms with the same atomic number but different mass numbers
or atoms with…

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Topic 1.3

Ionic bond: an attraction between oppositely charged ions

Covalent bond: a pair of electrons shared between two atoms

Dative covalent bond: a pair of electrons shared between two atoms, one of which provides
both of the electrons

Metallic bond: an attraction between a cation and a sea of…

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