Atoms & Periodic Table

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Across
  1. 2. This subatomic particle has a negative charge.
  2. 3. It is a pure substance that cannot be broken down into simpler substances.
  3. 4. It is a basic unit of an element.
  4. 5. The horizontal rows on the periodic table are called ___________.
  5. 8. This tells you the number of protons in the nucleus of the atom.
  6. 9. It contains all the information about an element.
Down
  1. 1. These elements have properties of both metals and non-metals.
  2. 5. This subatomic particle has a positive charge.
  3. 6. A short-hand abbreviation for the element name.
  4. 7. Kr is the symbol for this element.