CC4

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Across
  1. 5. Does not react.
  2. 6. The mean mass of an atom relative to the mass of one-twelfth of an atom of carbon-12, which is assigned a mass of 12.
  3. 8. ___________ property. A description of how a material behaves and responds to forces and energy.
  4. 9. The number of protons in the nucleus of an atom (symbol Z). Also known as the proton number.
  5. 12. Areas around a nucleus that can be occupied by electrons, usually drawn as circles
Down
  1. 1. The arrangement of electrons in shells around the nucleus of an atom. Electronic...
  2. 2. What you think will happen in an experiment and why you think this.
  3. 3. An ordered list of all known elements.
  4. 4. A vertical column of elements in the periodic table.
  5. 7. ___________ property. How a substance reacts with other substances.
  6. 10. Tiny particle with a negative charge that is found in shells around the nucleus of an atom.
  7. 11. A horizontal row in the periodic table.