Across
- 4. melting point is 1,750
- 6. atomic symbol is RA
- 8. electro negativity is 2.0
- 9. atomic number is 41
Down
- 1. atomic number is 13
- 2. boiling point is 758.85 celcius
- 3. atomic number is 47
- 5. year of discovery 1766
- 7. atomic number is 2
- 10. weight is 55.845