Chemical Bonds Crossword Puzzle

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Across
  1. 4. An element that gains electrons to form negative ions.
  2. 6. The basic unit of a chemical element.
  3. 8. An element that loses electrons to form positive ions.
  4. 9. A subatomic particle with a negative charge.
  5. 10. A representation of a substance using symbols for its elements.
Down
  1. 1. Type of bond where electrons are shared between atoms.
  2. 2. Type of bond where electrons are transferred between atoms.
  3. 3. A process that leads to the transformation of one set of chemical substances to another.
  4. 5. A group of atoms bonded together.
  5. 7. A connection between two atoms.