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10 Cards in this Set

  • Front
  • Back
Proton
Is a positively charged subatomic particle that is found in the nucleus of an atom.
Electron
Is a negatively charged subatomic particle that is found in the space outside the nucleus.
Neutron
Is a neutral subatomic particle that is found in the nucleus of an atom.
Atomic Number
Equals the number of proton is an atom of that element.
Mass Number
Sum of protons and neutrons in the nucleus of that atom.
Isotopes
Atoms of the same element that have different numbers of neutrons and different mass numbers.
Energy levels
Possible energies that electrons in an atom can have.
Electron Cloud
A visual model of the most likely locations for electrons in an atom.
Period
Row in a periodic table of elements
Group
A column of elements in a periodic table