Chemistry Vocabulary
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| Atomic Number | Number of protons in the nucleus of an atom.
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| Mass Number | Number of protons and neutrons in a nucleus.
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| Isotopes | Atoms with the same atomic number but different mass number (measured using a mass spectrometer).
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| Ion | Atom or group of atoms with an electric charge.
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| Relative Atomic Mass (RAM) | Average mass of an element including the abundance of the isotopes.
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| Molecules | A group of atoms joined by covalent bonds.
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| Covalent bonds | A chemical bond that involves sharing a pair of electrons between atoms in a molecule.
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| Molecular formula | Number of atoms of each element (eg H2O2).
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| Relative formula mass | Sum of all the relative atomic mass’ of each atom in a formula.
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| Mole | The relative formula mass in grams.
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| Immiscible | Liquids which can not mix, do not dissolve.
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| Miscible | Can completely dissolve in any proportions (eg alcohol + water)
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| Isomers | Molecules with the same molecular formula but a different arrangement of atoms in the molecule and different properties.
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