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The energy of the electron in the first orbit of He+ is -871.6x 10 -20J . The energy of the electron in the first orbit of hydrogen would be:
(1) -871.6 x10-20J
(2) -435.8x 10-20J
(3) -217.9x 10-20J
(4) -108.9x 10-20J
Ans: -217.9x 10-20J
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