Across
- 4. Positively charged ions
- 6. element with symbol Pb
- 8. number of protons in the nucleus
- 10. particles with no charge in an atom
- 11. electric charge on a proton
- 13. metal which exists as a liquid on room temperature
- 14. Highly reactive and soft metal which imparts yellow color when subjected to flame and is kept in kerosene
Down
- 1. element with atomic number 12
- 2. Element used in making slime
- 3. The anion OH stands for
- 5. The central part of an atom
- 7. modern name for stannum or stannic
- 8. Negatively charged radicals
- 9. Who discovered the nucleus
- 12. Metal which is an important constituent of steel and forms rust when exposed to moist air