Chemical Change =)

Compound = a chemical combination of two or more elements.

Chemicals bond = a link that atoms or electrically charged particles can form with each other.

Chemical formula = a way of using letters and numbers to show how much of each element is in a substance.

Ion = an electrically charge particle with unequal numbers of protons and electrons.

Molecucle = a Group of bonded atoms that acts like a single particle.

Chemical Property = a way of describing how  a substances change chemically with other substance.

Exothermic =a reaction that gives off heat.

Endothermic= a reaction that absorbs heat.