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Chem Vocab

QuestionAnswer
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.
physical change change in the physical properties of a substance, as size or shape
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
element one of a class of substances that cannot be separated into simpler substances by chemical means. See also chart under periodic table
chimical formula representation of a substance using symbols for its constituent elements
element (diatomic) molecule all of the atoms in the molecule are the same
compound molecule 2 diffrent elments
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
Chemical Reaction The chemical reaction H2(g) + ½ O2(g) → H2O(l) describes the formation of water from its elements.
reactants Starting material in a chemical reaction
products A product is a substance that is formed as the result of a chemical reaction
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
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
Created by: b0201857
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