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9 Cards in this Set
- Front
- Back
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Define "elements".
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Pure substances that cannot be broken down into simpler substances by chemical means.
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Define "atomic number".
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Number of protons in an atom.
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Define "compounds".
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Chemical substances composed of two or more elements chemically joined in a fixed ratio.
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Define "nucleus".
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The centre of the atom, containing protons and neutrons.
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Define "electron cloud".
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The region around the nucleus where electrons move.
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Define "mass number".
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Total number of protons and neutrons in the nucleus.
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Define "isotopes".
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Forms of an element that have a different number of neutrons.
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Define "chemical bonds".
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Forces of attraction between atoms that hold them together.
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Define "subatomic particles".
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Particles found inside atoms, such as protons, neutrons, and electrons.
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