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QJEEM02Ch9316: JEE Main 2002 Chemistry - Class 11 JEEM02Ch9316 Solution: In a hydrogen atom, if energy of an electron in ground state is …

In a hydrogen atom, if energy of an electron in ground state is -13.6 eV, then that in the 2nd excited state is

Multiple Choice Options

  • A -1.51 eV
  • B -3.4 eV
  • C -6.04 eV
  • D -13.6 eV

Step-by-Step Verified Solution

n = 1 means ground state

n = 2 means 1st excited state

n = 3 means 2nd excited state

Remember: nth excited state means n = n + 1

We know energy of an atom is given by

Energy (E) = -13.6 × Z2n2

= -13.6 × 19 [ ∵ Z = atomic number = 1 for hydrogen atom]

= -1.51 ev

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