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The successive ionisation energies of an atom of an element A are:
$900 k J m o l e^{1}$ , $1757 k J m o l e^{- 1}$ , $14850 k J m o l e^{- 1}$ respectively. The element is most likely to be

A. B

B. Be

C. F

D. Ba

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Correct Answer :

B. Be

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