atom
Basic unit of matter
atomic mass unit (amu)
the unit used to measure the mass of a proton or neutron
atomic mass
Number of protons plus neutrons
electrical charge
a property of matter, either positive or negative
electron
a negatively charged subatomic particle
electron cloud
area around the nucleus of an atom where the atom's electrons are most likely to be found
subatomic particle
protons, neutrons, electrons
neutron
subatomic particle in nucleus & has no charge (neutral)
nucleus
Center of an atom
proton
subatomic particle has a positive charge, found in the nucleus of an atom