chemical bonds

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Across
  1. 5. a group of atoms held together by chemical bonds
  2. 7. accompanied by the release of heat.
  3. 9. when something changes shape or size
  4. 10. a formula to determine what the atom is made out of
Down
  1. 1. building blocks for everything
  2. 2. an electron in the outer shell
  3. 3. complot the set you need to combined with 2 others
  4. 4. type of bond shares electrons
  5. 6. bond where opposites attract
  6. 8. a link between atoms