2. Questions Bank
  3. JEE Main & Advanced
  4. Physics
  5. Atomic Physics

JEE Main & Advanced Physics Atomic Physics Question Bank Self Evaluation Test - Atoms

  • question_answer
    The energy difference between the first two levels of hydrogen atom is 10.2 eV for another element of atomic number 10 and mass number 20, this will be

    A)  2040 eV

    B)  0.201 eV

    C)  510 eV

    D)  1020 eV

    Correct Answer: D

    Solution :

    [d] For H atom \[{{E}_{2}}-{{E}_{1}}=10.2eV\] \[\text{For }Z=10,\] \[{{E}_{1}}=\frac{-13.6\times {{10}^{2}}}{{{1}^{2}}}=-1360eV\] \[{{E}_{2}}=\frac{-13.6\times {{10}^{2}}}{{{2}^{2}}}=-3.4\times 100=-340eV\] \[\therefore {{E}_{2}}-{{E}_{1}}=-340-\left( -1360 \right)=1020eV\]


You need to login to perform this action.
You will be redirected in 3 sec spinner