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Chemical Reactions

TermDefinition
arrow read as yields in a chemical formula
characteristics of a chemical reaction changes in energy or properties
proof of chemical reaction gas produced (bubbles); light produced; temperature change; color change; precipitate forms; odor; new substance
chemical equations shorter, easier way to show chemical reactions by using symbols instead of words
coefficient number placed in front of a chemical formula in an equation. Tells how many molecules of each reactant and product take part in the reaction
conservation of mass the amount of matter involved in a chemical reaction does not change. The total mass of the reactants must equal the total moss of the products
physical changes alter only the physical properties of matter; no new substances formed
chemical changes alter the chemical properties of matter; new substances with new properties are formed
precipitate a solid that forms from a liquid during a chemical reaction
products the materials you have after a chemical reaction; written on the right side of the formula
reactants the materials you have at the beginning of a chemical reaction; written on the left side of the formula
states of matter solid, liquid or gas
subscripts show the number of atoms of an element in a molecule
valence electrons The electrons in the outermost energy level of an atom
compound A substance made of two or more elements that are chemically bonded
Gas production bubbles, fizzing, smoke
Created by: jmarti8
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