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chemical equations
vocabulary
Term | Definition |
---|---|
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 |
product | the substances that are formed during a chemical reaction |
ionic bond | a chemical bond in which one atom gives up electrons to another atom that gains the electrons |
covalent bond | 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 equations | an 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 |