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Chemical Reactions

Chemistry The study of matter and how matter changes.
Matter Anything that has mass and takes up space.
Reactants The substances on the left side (beginning) of a chemical equation.
Chemical equation A shorter, easier way to show chemical reactions using symbols instead of words.
Conservation of mass Matter is not created or destroyed.
Endothermic A chemical reaction that absorbs energy in the form of heat.
Activation energy The minimum amount of energy that has to be added to start a reaction.
Inhibitor A material used to decrease the rate of a chemical reaction.
Combustion A rapid reaction between oxygen and a fuel.
Enzymes Chemicals that act as biological catalysts by speeding up reactions in living things.
Subscript The number placed below an element's symbol in a chemical formula.
Chemical change A change that produces a new substance.
Coefficient Tells you how many atoms or molecules of a reactant or a product take part in a reaction.
Precipitate A solid that forms from solution during a chemical reaction.
Exothermic A chemical reaction that releases energy in the form of heat.
Open system Where matter can enter from or escape to the surroundings.
Chemical formula Shows the ratio of elements present in a compound.
Created by: sikkwl