Across
- 2. a thin layer of metal
- 6. basic unit of a chemical element
- 8. created the periodic table
- 12. a part/aspect of abstract
- 13. a group of atoms
- 14. a subatomic particle in all atomic neclie
- 15. (5 words) discovery that mass's nor destroyed in chemical reactions
- 20. a subatomic particle same mass as a proton without electric charge
- 21. a mixture
- 22. 8A-0. Helium, neon, Argon arts some examples
- 23. arranged in order of increasing atomic number
- 24. a central most important part of an object
Down
- 1. with exception of hydrogen. Left hand column of the periodic table
- 2. multiplying quantities
- 3. a column
- 4. noble gases, groups 14-16
- 5. Associated with an atom
- 7. a shortcut (ex:zinc-Zn)
- 9. a substance undergoes change
- 10. a release of heat
- 11. number of protons
- 16. mass of an atom
- 17. of or related to an orbit or orbits
- 18. absorbance of heat
- 19. boron, silicon, germanium, arsenic, antimony, tellurium, and polonium