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Aufbau Principle

Find energy l...

Question

Find energy level of electron present in $L i^{2 +}$ having velocity $2.18 \times 10^{6} m / s e c .$

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Solution

Velocity of a single $e^{-}$ system is given by the formula.
$V_{n} = 2.18 \times 10^{6} \frac{z}{n} m / s$
$∴ 2.18 \times 10^{6} = 2.18 \times 10^{6} \times \frac{3}{n}$
$\Rightarrow n = 3$

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