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