Question

what is thorium Th?​

Answer 1

Answer:

Thorium (Th), radioactive chemical element of the actinoid series of the periodic table, atomic number 90; it is a useful nuclear reactor fuel. Thorium was discovered (1828) by Swedish chemist Jöns Jacob Berzelius. It is silvery white but turns gray or black on exposure to air.

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Answer 2

Explanation:

Thorium (Th), radioactive chemical element of the actinoid series of the periodic table, atomic number 90; it is a useful nuclear reactor fuel. Thorium was discovered (1828) by Swedish chemist Jöns Jacob Berzelius. It is silvery white but turns gray or black on exposure to air.

Symbol: Th

Electron configuration: [Rn] 6d27s2

Atomic number: 90

Atomic mass: 232.03806 u

Parent material class: Bismuth

Discoverer: Jöns Jacob Berzelius