Chemistry

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Across
  1. 3. rows of the periodic table
  2. 4. the smallest part of the element that contains all the element's properties
  3. 6. is a pure substance that is made from more than two or more substances
  4. 8. the outermost shell of the electron
  5. 9. something that can not be broken down any further
  6. 10. positively charged particles in the atom
Down
  1. 1. lithium, sodium, potassium
  2. 2. neutral particles in the nucleolus of the atom
  3. 5. group of atoms that has lost or gained electrons
  4. 7. pure