Chemistry

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Across
  1. 4. Breaks down into Polar and NonPolar.
  2. 7. It contains Protons, Neutrons, and Electrons.
  3. 9. When the formula of an atom changes and creates a new substance.
  4. 10. H2O
  5. 11. The outermost shell of an electron.
Down
  1. 1. When a chemical bond gives off heat.
  2. 2. Usually negatively charged.
  3. 3. Groups of atoms held together.
  4. 5. Electrons are shared between the atoms.
  5. 6. Usually positively charged.
  6. 8. Links between atoms.