Matter Atoms
Protons
Neutrons
Electrons
Nucleus
Atomic Number
Atomic Mass
Anything that has mass and takes up space (volume)
Positively charged particles
:: Neutral particles; have no electric charge
Smallest possible unit into which matter can be divided, while still maintaining its properties.
The center of an atom
.: The number of protons in the nucleus of an atom
Found Outside the nucleus
# Number of protons and Neutrons in the nucleus