Endothermic
energy is absorbed
exothermic
energy in the form of heat is given off by the reaction
Law of Conservation of Matter
Matter is not created nor destroyed in any chemical or physical change
compound
A substance made up of atoms of two or more different elements joined by chemical bonds
The five forms of energy are:
Heat Energy, Light Energy, Chemical Energy, Mechanical Energy, and
Electrical Energy
Atomic Mass:
This number is equal to the number of protons PLUS the number of neutrons in
that element
Atomic Number:
This number is equal to the number of protons and the number of electrons in
that element.
Electrons
Outside the nucleus in electron orbitals
Reactant:
what is entering the chemical reaction; always on the left side of the equation
Product:
what is produced during a chemical reaction; always on the right side of the equation