The only radioactive element among the lanthanoids is

Gadolinium

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Holmium

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Promethium

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Neodymium

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Solution

The correct option is C Promethium
The only radioactive element among the lanthanides is Promethium.
Promethium, originally prometheum, is a chemical element with the symbol Pm and atomic number 61. All of its isotopes are radioactive.

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Similar questions

Which of the following Lanthanoid is radioactive?

S c (Z = 21)

Z n (Z = 30)

+ 3

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