The first transactinide — and chemically a heavier cousin of hafnium, not an actinide at all.
- Atomic number
- 104
- Atomic mass
- [267] u
- Phase
- Solid
- Electron configuration
- [Rn] 5f¹⁴ 6d² 7s²
- Melting point
- 2,400 K · 2,126.9 °C
- Boiling point
- 5,800 K · 5,526.9 °C
- Density
- 23.2 g/cm³
- Electronegativity
- —
- Period / Group
- 7 / 4
- Discovery year
- 1964