#104
Rf
Rutherfordium
267 u

Rutherfordium

Transition Metal
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Properties

Symbol Rf
Atomic Number 104
Atomic Mass 267
Protons 104
Neutrons 163
Electrons 104
Type Transition Metal
Isotopes Rutherfordium-267
Discovery Year 1964
Discovered By A. G. B. Khiseng, G. N. Flerov, and others
Group 4
Period 7
Boiling Point Unknown
Melting Point 2100°C
Electron Configuration [Rn] 7s² 5f¹⁴ 6d²
Density (g/cm³) 17.4
Crystal Structure Unknown
Magnetism Unknown
Abundance in Earth's Crust Trace
Phase at Room Temperature Solid
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