# Answer to Question #57746 in General Chemistry for vicky singh

Question #57746

a) Calculate the ionisation energy of rubidium per atom, if light of wavelength 5.84 10 8 m produces electrons with a speed of 2.450 106 ms 1. (5)

[Hint: Assume that the threshold frequency refers to the frequency corresponding to the ionisation energy.]

b) Assume that the electron in Li2+ ion is in third orbit. Calculate (5)

i) the radius of the orbit, and

ii) the total energy of the electron

[Hint: Li2+ ion also has atomic spectra similar to hydrogen atom. while applying relevant equations, use Z

[Hint: Assume that the threshold frequency refers to the frequency corresponding to the ionisation energy.]

b) Assume that the electron in Li2+ ion is in third orbit. Calculate (5)

i) the radius of the orbit, and

ii) the total energy of the electron

[Hint: Li2+ ion also has atomic spectra similar to hydrogen atom. while applying relevant equations, use Z

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