Atomic Theory

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Across
  1. 2. where an electron is likely to be found in an atom
  2. 5. the central part of the atom
  3. 6. a small portion of matter
  4. 8. a pure substance made of only one type of atom that cannot be broken down into other substances
  5. 9. the smallest object that retains the properties of an element
  6. 10. particle found in a nucleus with a positive charge
Down
  1. 1. a particle made up of two or more atoms that are chemically bonded together
  2. 3. fundamental unit of negative charge
  3. 4. smaller than or occurring within an atom
  4. 7. almost identical in mass to a proton, but carries no electric charge