Across
- 3. atomic mass of 55
- 5. actinides family
- 7. group 14 period 5
- 9. 6 neutrons
- 10. 157 neutrons
- 12. Metalloids family
- 14. atomic number of 79
Down
- 1. 13 electrons
- 2. noble gases family
- 4. period 2 group 13
- 6. atomic mass of 52
- 8. transition metal
- 11. 174 neutrons
- 13. 53 protons