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9 Cards in this Set
- Front
- Back
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Atomic Number |
This is the number of protons in an atom. It is written as a subscript on the bottom left of the symbol |
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Element |
Asubstance made up of only one type of atom |
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Compound |
Asubstance made up of atoms of at least two different types, chemically bondedin a fixed ratio |
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Molecule |
Twoor more atoms (of either element or compound) bonded together in a fixednumber, e.g. water, always one hydrogen and two oxygen |
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Crystal Lattice |
Atomsor ions bonded together in a fixed ratio but not a fixed number - Usually verylarge number, e.g. Salts, copper sulphate, metals, carbon, diamond |
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Ion |
Atomor group of atoms that have either gained or lost electrons and therefore havea positive or negative |
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Mass Number |
Thenumber of Protons and Neutrons in an atom. Written on the top, left of a symbol |
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Relative Atomic Mass |
The average mass number of all the naturallyoccurring isotopes of an element |
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Isotope |
Sameelement but has a different number of neutrons, therefore different mass number |
