90 Th Thorium 232,04 u

Thorium

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Periode
7
Gruppe
—
Block
f-Block
Phase (STP)
Solid

Thorium is a weakly radioactive actinide being researched as a nuclear fuel. It is more abundant than uranium in Earth's crust.

About Thorium

Abundance sets thorium apart from the other heavy actinides: the crust contains more of it than of uranium, and its weak radioactivity makes it comparatively tractable to handle. The element holds atomic number 90 and a relative atomic mass of 232.04, with the configuration [Rn] 6d2 7s2 and an electronegativity of 1.3. It is a solid at standard temperature and pressure and belongs to the f-block of period 7. Its abundance and nuclear behaviour together explain sustained research interest in thorium as a reactor fuel, an application investigated as an alternative to the uranium fuel cycle that currently dominates civil nuclear power. Unlike most members of the series, thorium is recovered from ordinary mineral processing rather than produced in a reactor.

Physikalische Eigenschaften

Atommasse 232.04 u
Phase bei STP Solid

Elektronische Eigenschaften

Elektronegativität 1.3

Elektronenkonfiguration

Konfiguration [Rn] 6d² 7s²

Electron Shell Configuration

Thorium electron shell configuration Th 2e⁻ 8e⁻ 18e⁻ 32e⁻ 18e⁻ 10e⁻ 2e⁻
Electron shell structure of Thorium — electrons per shell.
Shell Electrons
1 (K) 2
2 (L) 8
3 (M) 18
4 (N) 32
5 (O) 18
6 (P) 10
7 (Q) 2

Position in Periodic Table

Thorium position in the periodic table Th

Block & Periode

Block

s p d f

Periode

1 2 3 4 5 6 7

Periodensystem

Lanthanide Actinide

Reaktionen mit Th

Alpha Decay of Uranium-238

²³⁸U → ²³⁴Th + ⁴He

Nuclear

Alpha Decay of Thorium-232

²³²Th → ²²⁸Ra + ⁴He

Nuclear

Mehr Actinoid

89 Ac Actinium 91 Pa Protactinium 92 U Uranium 93 Np Neptunium 94 Pu Plutonium 95 Am Americium 96 Cm Curium 97 Bk Berkelium 98 Cf Californium 99 Es Einsteinium

Frequently Asked Questions

What is Thorium?
Thorium (Th) is a chemical element with atomic number 90. It is a solid at standard temperature and pressure, classified as a actinoid.
What are the key properties of Thorium?
Thorium has an atomic mass of 232.04 u.
What is the electron configuration of Thorium?
The electron configuration of Thorium is [Rn] 6d2 7s2. It is in the f-block of the periodic table.
What is the electronegativity of Thorium?
Thorium has an electronegativity of 1.3 on the Pauling scale.