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8th Cons of Mass

TEKS 8.6E

TermDefinition
Conservation of mass the law that states mass is neither created or destroyed in chemical reactions; total mass stays the same
reactant the substance(s) present at the beginning of a chemical reaction
product the substance(s) present at the end of a chemical reaction
yield represented by an arrow; indicates the direction of a chemical reaction, showing that reactants have been converted into products
chemical equation a symbolic representation of a chemical reaction using symbols and formulas
subscript small numbers after an element that tell the number of atoms of that element present; cannot be changed without changing the actual compound
coefficient a whole number that appears in front of a chemical formula or symbol in a chemical equation to indicate how many molecules of a substance are involved in the reaction
balanced equation an equation for a chemical reaction in which the number of atoms for each element in the reaction are the same for both the reactants and the products.
chemical symbol represent elements on the periodic table; can be 1 or 2 letters 1st letter is ALWAYS CAPITAL, if 2nd letter it is always lowercase
chemical formula the chemical symbols of the elements present in a compound with subscripts showing how many atoms of each element
periodic table a chart that organizes all known elements
Created by: NEISDSci
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