Q.
The electronic configuration of an element is Rn7s26d2, the element is
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a
Thorium, d-block element
b
Protactinium, d-block element
c
Actinium, d-block element
d
Thorium, f-block element
answer is D.
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Detailed Solution
Thorium(Z=90) is an actinoid element in which the differentiating electron enters into 6d subshell;Th-Rn7s26d2;Evidence for this fact comes from spectroscopy;
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