Chem 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 mass of the product of a chemil reaction must be the same as the mass of the reactants in that reactin.
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| physical change | change in the physical properties of a substance, as size or shape
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| chemical change | 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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| chimical formula | representation of a substance using symbols for its constituent elements
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| element (diatomic) molecule | all of the atoms in the molecule are the same
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| compound molecule | 2 diffrent elments
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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 chemical reaction H2(g) + ½ O2(g) → H2O(l) describes the formation of water from its elements.
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| reactants | Starting material in a chemical reaction
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| products | A product is a substance that is formed as the result of a chemical reaction
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| coefficent | a coefficient is a multiplicative factor in some term of an expression (or of a series); it is usually a number, but in any case does not involve any variables of the expression. For instance in
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| subscript | It is the number of atoms in the preceding element.
Read more: http://wiki.answers.com/Q/In_chemistry_what_is_the_meaning_of_subscript#ixzz289RbmA9a
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