Rutherfordium

Rutherfordium,  ₁₀₄Rf

General properties
Name, symbol	Rutherfordium, Rf
Rutherfordium in the periodic table
Hf ↑ Rf ↓ Upo Lawrencium ← Rutherfordium → Dubnium
Atomic number	104
Standard atomic weight (Ar)	267
Group, block	4; d-block
Period	period 7
Electron configuration	[Rn] 5f14 6d2 7s2
per shell	2, 8, 18, 32, 32, 10, 2
Physical properties
Phase	Solid (predicted)
Density near r.t.	23.2 g/cm3 (predicted)
Atomic properties
Oxidation states	+2, +3, +4 ​(predicted)
energies	1st: 580 kJ/mol 2nd: 1390 kJ/mol (predicted) 3rd: 2300 kJ/mol (predicted) (more)
Atomic radius	calculated: 150 pm
Covalent radius	157 pm (estimated)
Miscellanea
Crystal structure	​
CAS Registry Number	53850-36-5
History
Discovery	Joint Institute for Nuclear Research (1964)
Named by	after Ernest Rutherford

Rutherfordium (Rf) is a highly radioactive transactinide. It is near to impossible to make or own this element in a hobby laboratory and even most professional laboratories.

Predicted properties

Chemical

Rutherfordium is thought to have similar chemical properties as other group 4 elements.

Physical

Rutherfordium should be a very heavy metal.

Availability & Isolation

Since it has only been produced in minute amounts in advanced nuclear research facilities, any amount of Rf can only be used for a few minutes or hours in limited nuclear research.

Handling

Safety

If one somehow manages to make this, it will quickly decay, releasing a LOT of radiation, and it's decay products will release even more radiation, as well as generating a lot of heat.

Storage

If one manages to somehow acquire this, the sample should be stored in a container with very thick lead walls.

Disposal

Given the minute amounts of rutherfordium produced so far, no disposal is necessary.