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Question

Which of the following is natural element?

A
Pm
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B
Li
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C
Pu
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D
Np
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Solution

The correct option is A Li
Li is natural element. It is s block element. Pm is a lanthanoid. Pu and Np are actinides. Pm, Pu and Np are produced synthetically by the transformation of naturally occurring elements by nuclear reactions. Hence they are not natural element.

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