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An element having electronic configuration `[Rn]6s^(1)` will:

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An element having electronic configuration `[Rn]6s^(1)` will:
A. Form basic oxide
B. Can be used in photolectric cell
C. Form acidic oxide
D. Has high ionisation enthalpy
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Correct Answer - A::B
The element is Cs.
Due to larger size and low ionisation enthalpy of `[Rn]6s^(1)` (i.e. Cs).
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