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Recent questions tagged telegram-1873

(chatquestion)...69. Let A be the sum of the first 20 terms and B be the sum of the first 40 terms of the series 1' +2-2° +3 +2+4 +5° + 2+6° +. If B-2A=100 2, then 2 is equal to: 232 (1) (2) (3) (4) 248 464 496

asked May 28, 2020 by balaji.thirumalai

1 answer

(chatquestion)...4. Wavelength of photon released from transition of electron from 4 → 2 in He2+ is equivalent to transition of electron H+ from :- (1) 3 → 1 (2) 2→ 1 (3) 3→ 2 (4) 4 → 2

asked Jan 23, 2020 by balaji.thirumalai

1 answer

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