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Q.

what is the potential energy of an electron Present in N-shell of the Be³⁺ ion?

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a

-13.6 eV

b

-3.4 eV

c

-27.2 eV

d

-6.8 eV

answer is D.

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Detailed Solution

Energy of N-shell = $\frac{- 13 .6 \times (4)^{2}}{(4)^{2}} = - 13 .6 eV$
$∴$ P.E. = 2 x E $\Rightarrow$ 2 x -13.6 = -27.2eV

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