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Energy of an electron in the nth orbit o...

Energy of an electron in the nth orbit of hydrogen atom is given by E,- ev. How much energy is required to take an electron from the ground state to the first excited state?

Text Solution

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In hydrogne atoms ground state correponds to n = 1 and the first excited state corresponds to n = 2. Hence , energy required .
`E = E_(2) - E_(1) = (-13.6)/((2)^(2)) -[(-13.6)/((1)^(2))] = - 3.4+13.6 = +10.2 eV`
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Knowledge Check

  • The energy required to excite an electron from the ground state of hydrogen atom to the first excited state, is

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    D
    `1.656 xx 10^(-20) J`

  • the energy required to excite an electron in hydrogen atom to its first excited state is

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    `8.5eV`
    B
    `10.2eV`
    C
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