Christina's 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 |
the principle that in any closed system subjected to no external forces, the mass is constant irrespective of its changes in form; the principle that matter cannot be created or destroyed.
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| Physical Change | a usually reversible change in the physical properties of a substance, as size or shape
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| Chemical Change | a usually irreversible chemical 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. See also chart under periodic table.
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| Chemical Formula | a representation of a substance using symbols for its constituent elements
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| Element (Diatomic) Molecule | diatomic molecules are molecules composed only of two atoms.
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| Compound Molecule | The smallest particle into which an element or a compound can be divided without changing its chemical and physical properties
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| Chemical Equation | a representation of a chemical reaction using symbols of the elements to indicate the amount of substance, usually in moles, of each reactant and product
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| Chemical Reaction |
the action caused by the resistance to another action.
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| Reactants (of a chemical equation) | any substance that undergoes a chemical change in a given reaction.
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| Products (of a chemical equation) | substance that forms as a result of a chemical reacion.
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| Coefficient (in a chemical equation) | A number or symbol multiplied with a variable or an unknown quantity in an algebraic term,
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| Subscript (in a chemical equation) | A distinguishing character or symbol written directly beneath or next to and slightly below a letter or number.
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