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5 Cards in this Set

  • Front
  • Back
Atom
basic unit of matter
Nucleus
the center of the atom which contains the protons and neutrons; in cells, the structure that contains the cell's genetic material (DNA) and controls the cell's activities
Electron
negatively charged particle; located outside the atomic nucleus
Element
substance consisting entirely of one type of atom
Isotope
atom of an element that has a number of neutrons different from that of other atoms of the same element