104
Rf
267
Rutherfordium (Rf)
Element 104 · Period 7 · Group 4
transition-metal
solid at room temp
d-block
radioactive
synthetic
About Rutherfordium
First transactinide element. Superheavy synthetic element with very short half-life.
Physical Properties
Atomic Mass
267 u
State at 25°C
Solid
Melting Point
2100 °C
Boiling Point
5500 °C
Density
23.2 g/cm³
Magnetism
Paramagnetic
Atomic Properties
Electron Configuration
[Rn] 5f¹⁴ 6d² 7s²
Electron Shells
2, 8, 18, 32, 32, 10, 2
Oxidation States
+4
Discovery & History
Discovered By
Joint Institute for Nuclear Research
Discovery Year
1964
Named By
IUPAC
Name origin: Ernest Rutherford
Frequently Asked Questions
- Is Rutherfordium a metal, nonmetal, or metalloid?
- Rutherfordium is classified as a transition-metal.
- What state is Rutherfordium in at room temperature?
- Rutherfordium is a solid at standard room temperature (25°C).
- What is the atomic mass of Rutherfordium?
- Rutherfordium has an atomic mass of 267 atomic mass units (u).
- Who discovered Rutherfordium?
- Rutherfordium was discovered by Joint Institute for Nuclear Research in 1964.
- Where is Rutherfordium on the periodic table?
- Rutherfordium is element number 104, located in period 7 and group 4.