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18/08/2021 11:42 am
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The energy of e– in first orbit of He+ is –871.6 × 10–20 J. The energy of e– in first orbit of H is:
(a) – 871.6 × 10–20
(b) –435.8 × 10–20 J
(c) – 217.9 × 10–20 J
(d) –108.9 × 10–20
1 Answer
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18/08/2021 11:47 am
Correct answer: (c) – 217.9 × 10–20 J
Explanation:
E1He+ = E1H x Z2
∴ -871.6 x 10-20 = E1H x 4
∴ – 217.9 × 10–20 J