Across
- 4. is in group 6 and has an atomic mass of 51.996
- 5. is represented by the letters Ba
- 9. has an atomic number of 41
- 10. is in group 5 with 4 valence electron shells
- 13. has an atomic mass of 88.906 and is in period 5
- 14. has 8 valence electrons with 3 electron shells
- 15. Has 93 protons
Down
- 1. has 20 protons
- 2. what is the first element in the periodic table
- 3. is represented by Tc on a periodic table
- 6. has 44 protons
- 7. has 8 valence electrons and is in period two
- 8. Is represented by Na on a periodic table
- 11. has an atomic mass of 87.62 and is in group 3
- 12. is represented by the letters Zr