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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 electron of 90 eV can 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

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The correct Answer is:
A, C, D
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