Vocab Chemical Reactions

Chemical Reactions 22 Questions

A process where atoms rearrange to form one or more new substances.

reactant

A substance formed from a chemical reaction

Product

Forces that hold atoms together in a molecule or compound

Chemical Bonds

When energy or electrons move from one substance to another during a chemical reaction.

Transfer

When energy or matter changes from one form to another during a chemical reaction.

Conversion

The amount of substance in a specific volume or space

Concentration

Energy stored in the bonds of a substance

Chemical Potential Energy

The total energy of all particles in a substance, including heat energy

Thermal Energy System

Everything around a system that can affect or be affected by it

Environment

A combination of symbols that shows what elements are in a compound

Chemical Formula

A way to show a chemical reaction using symbols instead of words

Chemical Equation

A number in front of a chemical formula that shows how many molecules take part in the reaction.

Coefficient

A small number written at the bottom right of a chemical symbol showing how many atoms of that element are in the molecule.

Subscript

A change that alters the form or appearance of a substance but does not change what it is (usually reversible).

Physical Change

A change in matter where the substance turns into a new substance with different chemical and physical properties (mostly irreversible).

Chemical Change

A solid that forms from liquids during a chemical reaction

Precipitate

Signs that a chemical change has occurred, like a precipitate forming, gas being produced, color change, temperature change, light, or smell.

Evidence Of Chemical Change

Matter cannot be created or destroyed; the total mass of reactants equals the total mass of products.

Law Of Conservation Of Mass

A reaction where two or more substances combine to make a new compound

Synthesis Reaction

A reaction where a compound breaks down into two or more simpler substances

Decomposition Reaction

A reaction where one element replaces another element in a compound

Single Replacement Reaction

A reaction where two compounds exchange ions to form new compounds

Double Replacement Reaction