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Chemical Equations
Term | Definition |
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Law of Conservation of Mass | a fundamental principle of science stating that mass cannot be created or destroyed in a closed system through ordinary chemical or physical means |
Reactant | the substances present before a chemical reaction occurs; in a chemical reaction the arrow usually points away from the reactant(s) |
Product | the substances that are formed during a chemical reaction; in a chemical reaction the arrows point toward the product |
Ionic Bond | a chemical bond in which one atom gives up electrons (cation) to another atom that gains the electrons (anion); results from a difference in electronegativity greater than 1.7 |
Covalent Bonds | a chemical link between two atoms that share electrons |
Compound | a chemical combination of two or more elements |
Subscript | a symbol, usually a letter or a number, placed immediately below and to the right of a written character |
Coefficient | the number placed in front of a chemical formula to indicates the number of molecules present |
Balanced Chemical Equation | a mathematical representation of a chemical process; contains chemical formulas and coefficients |
Chemical Formula | a set of symbols used to describe the elements within a substance |