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98Cf

Element 98

Californium

Actinides

Californium is a radioactive metallic chemical element with symbol Cf and atomic number 98.

Key data

Atomic number
98
Atomic mass
251.000 u
Group / Period
3 / 7
Block
f-block
Phase at STP
Solid
Density
15.1 g/cm³
Melting point
899.9 °C
Boiling point
1469.8 °C
Electron configuration
[Rn] 5f10 7s2

Common uses

  • Neutron sources for cancer therapy
  • Oil-well logging
  • Research only

Discovery

Year: 1950

Discovered by: Lawrence Berkeley National Laboratory

Frequently asked questions

What is the atomic number of Californium?

Californium has atomic number 98. Its symbol is Cf and its atomic mass is 251 u.

What category of element is Californium?

Californium is classified as actinides. It sits in group 3, period 7 of the periodic table.

What is Californium used for?

Common uses of Californium include: Neutron sources for cancer therapy, Oil-well logging, Research only.

When was Californium discovered?

Californium was discovered in 1950 by Lawrence Berkeley National Laboratory.

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