science vocab
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 conservation of mass | a fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system
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| physical change | usually reversible change in the physical properties of a substance, as size or shape:
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| chemical reaction | usually irreversible reaction involving the rearrangement of the atoms of one or more substances and a change in their chemical properties or composition, resulting in the formation of at least one new substance
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| element | one of a class of substances that cannot be separated into simpler substances by chemical means.
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| chemical formula | representation of a substance using symbols for its constituent elements
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| element(diatomic) molecule |
molecules composed only of one atom, of either the same or different chemical elements
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| compound molecule | molecules composed more than one atom
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| chemical equation | the symbolic representation of a chemical reaction where the reactant entities are given on the left hand side and the product entities on the right hand side
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| chemical reaction | a process that leads to the transformation of one set of chemical substances to another
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| reactants | A substance that takes part in and undergoes change during a reaction.
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| products | a substance that forms as a result of a chemical reaction
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| coefficient | a number that is constant for a given substance, body, or process under certain specified conditions, serving as a measure of one of its properties
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| subscript | Subscript in a chemical formula shows the amount of atoms of that type in each molecule.
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