90 Actinide

Thorium

RIS 0.017

Velocity —

Rank#75

Co-citedNd

Physical properties

Category Actinide

Block f-block

State Solid

Config [Rn] 6d2 7s2

Electronegativity 1.3

Density 11.72 g/cm³

Melting 2115.0 K

Boiling 5061.0 K

Ionization 587.0 kJ/mol

Oxidation +2, +3, +4

Discovered 1829 · Jons Jacob Berzelius

10-year trends

Research trends from the past decade for this element.

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Research intensity over time

Thorium's history

Thorium's research intensity, 1900 → today.

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Thorium's associations

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Thorium

Research trends from the past decade for this element.

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Research intensity over time

Thorium's associations