100 Fm Fermium 257.0 u

Fermium

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Period

Group

—

Block

f-block

Phase (STP)

Solid

Fermium is a synthetic element named after Enrico Fermi. It was also first identified in hydrogen bomb fallout debris.

Physical Properties

Atomic Mass 257.0 u

Phase at STP Solid

Electronic Properties

Electronegativity 1.3

Electron Configuration

Configuration [Rn] 5f¹² 7s²

Electron Shell Configuration

Position in Periodic Table

Block & Period

Block

s p d f

Period

1 2 3 4 5 6 7

Periodic Table

Lanthanides Actinides

More Actinide

89 Ac Actinium 90 Th Thorium 91 Pa Protactinium 92 U Uranium 93 Np Neptunium 94 Pu Plutonium 95 Am Americium 96 Cm Curium 97 Bk Berkelium 98 Cf Californium

Frequently Asked Questions

What is Fermium?

Fermium (Fm) is a chemical element with atomic number 100. It is a solid at standard temperature and pressure, classified as a actinide.

What are the key properties of Fermium?

Fermium has an atomic mass of 257.0 u.

What is the electron configuration of Fermium?

The electron configuration of Fermium is [Rn] 5f12 7s2. It is in the f-block of the periodic table.

What is the electronegativity of Fermium?

Fermium has an electronegativity of 1.3 on the Pauling scale.