vocab words from p.73-88
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| law of definite proportions | states that 2 samples of a given compound are made of the same elements in exactly the same proportions by mass regardless of the sizes or sources of the samples
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| law of conservation of mass | the mass of the reactants in a reaction = the mass of the products
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| law of multiple proportions | if 2 or more different compounds are composed of the same 2 elements
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| electron | a subatomic particle that has a negative charge
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| nucleus | in physical science, an atom's central region, which is up of protons and nutrons
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| proton | a subatomic particle that has a positive charg and that is found in the nucleus of the atom
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| neutron | a subatomic particle that has no charge
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| atomic number | the number of protons in the nucleus of an atom; the atomic number is the sames for all atoms of an element
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| mass number | the sum of the numbers of protons and neutrons in the and that is found in the nucleus of an atom
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| isotope | atoms of the same element that have different numbers of neutrons
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