Thorium (Th) - 90 on the Periodic Table | Periodic Table

Standard IUPAC: Thorium • Symbol: Th • Atomic Mass: 232.0377 u

Quick Factsheet: Thorium (symbol Th, atomic number 90) is element 90 on the periodic table of elements. It has a standard atomic weight of 232.0377 u and an electron configuration of [Rn] 7s2 6d2. On the periodic table, Thorium is classified in period 7 and group Main.

1. Periodic Table Position of Thorium (90 on the Periodic Table)

Element Thorium has atomic number Z = 90, meaning it contains 90 protons in its atomic nucleus and 90 electrons in its neutral state. On the standard periodic table of elements, Thorium is located in period 7 and group Main.

2. Electron Configuration & Oxidation States (Thorium Charges & Configuration)

Full Electron Configuration: [Rn] 7s2 6d2

Common Oxidation States (Charges): 2,3,4c

3. Physical Properties & Atomic Mass (Thorium Atomic Mass)

Element Thorium has a standard atomic weight of 232.0377 u. Its melting point is 2023. K and boiling point is 5093. K. The Pauling electronegativity value is 1.3.

Comprehensive chemical properties and data for Thorium (Th, Z=90).

Explore interactive 3D electron orbitals, isotopes, and properties on the periodic table: Open on Interactive Table 🚀

4. Related Elements in the Same Chemical Family

Ac (Z=89) Pa (Z=91) U (Z=92) Np (Z=93) Pu (Z=94) Am (Z=95)

5. Frequently Asked Questions about Thorium (FAQ)

What is the chemical symbol and atomic number of Thorium?

The chemical symbol of Thorium is Th and its atomic number is 90.

What is the atomic mass and electron configuration of Thorium?

Thorium has a standard atomic mass of 232.0377 u and ground-state electron configuration of [Rn] 7s2 6d2.

What periodic table group and period does Thorium belong to?

Thorium is located in period 7 and group Main on the periodic table of elements.

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