Chemical Change

Compund: a chemical combination of two or more elements

Chemical 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 charged particle with unequal numbers of protons and electrons.

Molecule: a group of bonded atoms that acts like single particle.

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

Exothermic:  a reaction that gives-off heat.

Endothermic: a reaction that absorbs heat.