chemistry 2nd

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Across
  1. 2. A group of them bonded together is a molecule
  2. 4. Positive ion
  3. 7. Tiny and negatively charged particle
  4. 9. Any of the four substances (earth, water, air, and fire)
  5. 10. Heavy and neutral particle
  6. 11. An arithmetical value like 4
Down
  1. 1. Electrically charged atom formed by the loss or gain of one or more electrons
  2. 2. Negative ion
  3. 3. It’s in the middle of the atom
  4. 5. Not supporting or helping either side in a conflict
  5. 6. Heavy and positively charged particle
  6. 8. Grey mass in the sky, made up of very small floating drops of water