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Chemical Reaction


Chemistry The study of the properties of matter and how matter changes.
Element Is a substance that cannot be broken down into any other substances by chemical or physical means.
Compound Is a substance made of two or more elements chemically combined in a specific ratio, or proportion.
Mixture Is made from two or more pure substances - elements, compounds, or both - that are in the same place but not combined as a new material.
Solution Is a well-mixed mixture.
Physical Change A change that alters the form or appearance of a material but does not make the material into another substance is called a...
Chemical Change A change in matter that new substances is called a...
Precipitate A solid that forms from solution during a chemical reaction is called a...
Atom The smallest particle of an element
Molecule Is the combination of two or more atoms.
Chemical Bond The force that holds atoms together
Chemical Equation Is a shorter, easier way to show chemical reactions, using symbols instead of words.
Symbol Most elements are represented by a one-letter or two-letter..
Chemical Formula A compound is represented by a "word," called a chemical formula, which shows the ratio of elements in the compound.
Subscript Show the number of atoms of an element in a molecule.
Reactants The materials you have at the beginning of a chemical reaction are...
Products When the reaction is complete, you have different materials, called the products of the reaction.
Conservation of Matter The principle stating that matter is not created or destroyed during a chemical reaction is conservation of matter.
Coefficent Is a number in front of a chemical formula in the equation.
Synthesis When two or more substances (elements or compounds) combine to make a more complex substance, the process is called...
Decomposition Reaction breaks down compounds into simpler products.
Replacement Reaction A reaction in which one element replaces another in a compound or in which two elements in different compounds trade places, is called a...
Exothermic Reaction A reaction that releases energy in the form of heat is called an...
Endothermic Reaction A reaction that absorbs energy is called an endothermic reaction.
Activation Energy Is the minimum amount of energy that has to be added to start a reaction.
Concentration Is the amount of one material in a given volume of another material.
Catalyst Is a material that increases the rate of a reaction by lowering the activation energy.
Enzymes Provides a surface on which reactions take place.
Inhibitor A material used to decrease the rate of a reaction is called an...
Combustion Is a rapid reaction between oxygen and a substance called a...
Fuel Is a material that releases energy when it burns.
Three things are necessary to start and maintain a fire Fuel, oxygen, and heat.
Water removes two parts of the fire triangle. Water removes two parts of the fire triangle.
Created by: kylanwolfe



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