Atoms

__**Atom**__-the smallest particle of matter __**Protons**-__ a positively charged particle located in the nucleus of an atom that makes up part of the atom's mass or weight
 * __Electrons__**-a negatively charged particle that moves very fast around the nucleus of an atom and does NOT make up any of the atom's mass or weight
 * __Neutrons-__** a neutrally charged particle located in the nucleus of an atom that makes up part of the atom's mass or weight
 * __Atomic Number-__** the total number of protons in the nucleus of an atom
 * __Atomic Mass (Weight)-__** the addition sum of all the protons and neutrons in the nucleus of an atom. This number is rounded off to the nearest whole number to calculate the number of protons
 * __Nucleus-__** the small dense core of an atom where the protons and neutrons are found
 * __Shell (Energy Levels)-__** energy levels around the nucleus of an atom where electrons can be found