Chemistry study guide

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Across
  1. 2. The atom circle holder
  2. 5. Gas
  3. 7. Release of cool
  4. 9. Element property between solid and solid non-metal
  5. 10. Solid material
  6. 12. No charge
  7. 13. Two or more elements
  8. 14. Russian chemist
  9. 15. 118 of them
  10. 16. Non-metal element
  11. 17. Not created not destroyed
  12. 21. Reaction of the product
  13. 22. Central part
  14. 23. Positive charge
Down
  1. 1. Abbreviation of the element
  2. 3. Number of protons and electrons
  3. 4. Charge of negative energy
  4. 6. The basic unit of an element
  5. 8. Outer most Orbital
  6. 11. The weight
  7. 18. Release of heat
  8. 19. A group of atoms
  9. 20. The substance formed by atoms