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A particular hydrogen like atom has its ...

A particular hydrogen like atom has its ground state binding energy = 122.4 eV . It is in ground state. Then,

A

Its atomic number is 3

B

An electrom of `90` eV cam excite it

C

An electron of kinetic energy nearly `91.8 eV` can be brought to almost rest by this atom

D

An electron of kinetic energy `2.6 eV` may emerge from the atom when electron of kinetic energy 125 eV collides with this atom

Text Solution

Verified by Experts

The correct Answer is:
A, C, D
`122.4 = (13.6Z^(2))/(1^(2)) rArr Z = 3, 91.8 = 122.4[1-(1)/(4)]`
So an electron of KE `91.8 eV` can transfer its energy to this atom.
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