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