(A) Electron moving in \( 2^{\text {nd }} \) orbit in \( \mathrm{He}^{+} \)ion (P) Radius of orb...
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0(A) Electron moving in \( 2^{\text {nd }} \) orbit in \( \mathrm{He}^{+} \)ion
(P) Radius of orbit in which electron is
\( P \) moving is \( 0.529 \AA \)
W)
(B) Electron moving in \( 3^{\text {rd }} \) orbit in \( \mathrm{H} \)-atom (Q) Total energy of electron is \( (-) 13.6 \times 9 \mathrm{eV} \)
(C) Electron moving in \( 1^{\text {st }} \) orbit in \( \mathrm{Li}^{+2} \) ion
(R) Velocity of electron is \( \frac{2.188 \times 10^{6}}{3} \mathrm{~m} / \mathrm{sec} \)
(D) Electron moving in \( 2^{\text {nd }} \) orbit of \( \mathrm{Be}^{+3} \) ion
(S) De-broglie wavelength of electron is \( \sqrt{\frac{150}{13.6}} \AA \)
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