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10 Cards in this Set

  • Front
  • Back
smallest particle of matter
atom
number above chemical symbol to organize the Periodic Table into periods; # protons
atomic number
subatomic particle outside the nucleus with a negative charge
electron
model that shows an area outside the nucleus where the electrons are
electron cloud model
the area outside the nucleus where the electrons orbit
electron cloud or shell
the combination of neutrons and protons
atomic mass
a subatomic particle with a neutral (0) charge that is inside the nucleus.
neutron
the central part of an atom that contains the neutrons and protons.
nucleus
a subatomic particle with a positive charge that is inside the nucleus.
proton
are on the outermost layer of the cloud (shell) and determine the reactivity of an atom/element.
valence electron