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One Line Answer
Answer the following
The atomic number of an element is 90. Is this element diamagnetic or paramagnetic?
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Solution
The electronic configuration of element with atomic number = 90 is [Rn] 5f0 6d2 7s2 . There are two unpaired electrons in the 6d orbital of the element. Hence, it is paramagnetic.
Concept: Inner Transition (f-block) Elements: Lanthanoids and Actinoids
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