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| a substance that cannot be broken down into other substances by ordinary chemical methods |
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| smallest possible particle of an element that retains the properties of that element |
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| particles that have very little mass but contain a small unit of electric charge designated as -1 or negative 1 |
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| particles that have very much more mass and carry and electric charge that is equal but opposite that of the electron |
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| particles that have just a little more mass than a proton but have no electric charge, hence they are neutral |
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protons and neutrons form this central part of the atom
although the nucleus occupies an extremely tiny fraction of the volume of the entire atom, practically all of the mass of the atom is concentrated in the nucleus |
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electrons move rapidly around the nucleus but are held in orbit by the positively charged protons
electrons are regarded as moving within specific enegery levels which may be depicted as shells |
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| the total number of neutrons and protons in an atom |
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| the number of an element is equal to the number of protons in each atom |
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| atoms of the same element containing different numbers or neutrons but the same number or protons |
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| chemically inert, will not react with other elements to form a compound |
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| an electrically charged atom ( or group of atoms) |
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bonding due to the attraction between positively charged ions(cations) and negatively charged ions(anions)
most common in minerals |
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| bonding in which atoms share electrons |
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| a weak electrostatic attraction between atoms caused by the positioning or their orbiting electrons |
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