Unit 2 Vocab: Chemical Reactions

The smallest particle that makes up all matter.

• chemical formulas

• products

• atom

• reactants

The simplest unit of a chemical compound; formed when two or more atoms chemically join together.

• molecule

• atom

• chemical equation

• properties

Physical and chemical characteristics of matter used to describe or identify a substance.

• subscript

• mass

• products

• properties

The process by which one or more substances change to produce a different/new substance.

• chemical formula

• chemical reaction

• molecule

• coefficient

Chemical formulas and symbols written to represent a reaction.

• coefficients

• subscripts

• chemical equation

• reactants

A set of chemical symbols and numbers as subscripts to represent the type and number of atoms that are present (CO2).

• chemical formula

• law of conservation of matter

• mass

• products

A number placed in front of a chemical symbol or formula in order to balance the equation.

• subscript

• coefficient

• chemical formula

• atom

A number written below and to the right of a chemical symbol that shows the number of atoms present.

• properties

• coefficient

• molecule

• subscript

A substance that takes part in and undergoes change during a reaction (left of yield).

• reactant

• product

• chemical reaction

• atom

A substance produced during a chemical reaction (right of yield) .

• reactant

• product

• chemical formula

• law of conservation of matter