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Atoms and Nuclei question

2001 · Q145
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Atoms and Nuclei question

2001 · Q145

NEETPhysicsAtoms and NucleiMCQ+4 / −1
The energy of hydrogen atom in nth orbit is En then the energy in nth orbit of singly ionised helium atom will be
  1. A
    4En
  2. B
    En/4
  3. C
    2En
  4. D
    En/2
View written solutionFree

Correct answer: A

As En = −2π2mK2Z2e4n2h2{{ - 2{\pi ^2}m{K^2}{Z^2}{e^4}} \over {{n^2}{h^2}}}n2h2−2π2mK2Z2e4​

For helium Z = 2. Hence requisite answer is 4En.

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