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According to the Bohr model the energy levels of a hydrogen atom can be found...

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According to the Bohr model the energy levels of a hydrogen atom can be found by making two assumptions i The electrons move in a circular orbit and ii The angular momentum of the electron in the 7 th th energy level is quantised to have a value The levels calculated with a nuclear charge Ze deals with a single electron in the orbit are called hydrogenic levels Assume that the two electrons in the ground state of a helium atom occupy the corresponding lowest hydrogenic level Now match Column I with Column II and select the correct option from the choices given below the column A The minimum repulsive energy between the two electrons would then be If for a hydrogen atom ionisation temperature is T the temperature at which he atoms ionise B C completely both electrons having left off the atom would be Energy required to remove two electrons from helium atom must be greater than A D Column I A 2 B 4 C 1 Your Answer A 1 B 4 C 3 A 1 B 3 C 2 A 2 B 3 C 1 Correct Answer Column 1 54 4 eV 2 27 Z eV 3 87 4 4T

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