Chemical Changes

A process where substances change to form new substances

A process where substances mix but do not change

A process where substances are separated physically

A process where substances are cooled down

They are broken down and new bonds form to create products.

They remain unchanged throughout the reaction.

They are always gases.

They disappear without forming anything new.

(s) = solid

(aq) = aqueous solution

(g) = gas

(l) = light

Bubbling or the appearance of an odor (other than boiling)

A decrease in temperature

A color change

The formation of a solid

A new substance has formed

The temperature has increased

The substance has melted

The reaction has stopped

Formation of a precipitate

Increase in temperature

Change in color only

Production of a gas

Mass

Types of atoms

Color

Number of each atom

Single Replacement

Double Replacement

Neutralization

Combustion

A single element replaces another in a compound

Two compounds exchange elements

Two elements combine to form a compound

A compound breaks down into elements

Double replacement reaction

Synthesis reaction

Decomposition reaction

Combustion reaction

Reactants: 2Mg, O2; Product: 2MgO

Reactants: 2MgO; Product: 2Mg, O2

Reactants: O2, 2MgO; Product: 2Mg

Reactants: 2Mg, 2MgO; Product: O2

They are exothermic

They always produce carbon dioxide and water

They require oxygen

They always produce a blue flame