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The ionisation energy of hydrogen atom is 13.6 eV, the ionisation energy of helium atom would be(a) 13.6eV(b) 27.2eV(c) 6.8eV(d) 54.4eV

Simran Bhatia , 11 Years ago
Grade 11
anser 3 Answers
Amit Saxena

Last Activity: 11 Years ago

(d)

E propoertional Z2 and Z for helium = 2

:. (E)He = 4 × 13.6 = 54.4 eV

Kamaljit

Last Activity: 7 Years ago

First Ionisation potential (energy) of He is ~2372 kJ/mol ~ 24 eV (the highest among all the elements) while the second IP is (calculated from Bohr theory) ~5250 kJ/mol ~ 54 eV.

Abhay

Last Activity: 6 Years ago

AsE=(13.6ev Z^2)÷n^2Atomic weigh of helium is 4E=13.6×4=54.4 Thanks for seen🙌🙋................

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