104Rf267
Rutherfordium
Transition metal · element 104 · group 4, period 7
Quick facts
| Symbol | Rf |
|---|---|
| Atomic number | 104 |
| Relative atomic mass | 267 |
| Category | Transition metal |
| Position | group 4, period 7 |
| State at 20 °C | Unknown (too few atoms have been made) |
| Melting point | — |
| Boiling point | — |
| Density | — |
| Electronegativity | — |
| Electron configuration | [Rn] 5f14 6d2 7s2 |
About Rutherfordium
Rutherfordium has the symbol Rf and atomic number 104, which means every rutherfordium atom has 104 protons in its nucleus and, in a neutral atom, 104 electrons. At room temperature it is unknown (too few atoms have been made).
Transition metals sit in the middle block of the periodic table. They are usually hard, dense and strong, often form coloured compounds, can have more than one ion charge, and many are useful catalysts.
Explore it
See where rutherfordium sits, and drag the temperature slider to watch it melt and boil, on the interactive periodic table. Practise with quizzes on OmniEx.