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The radius of the innermost electron orbit of a hydrogen atom is `5.3 xx 10^-11m . What are the radii the n=2 and n=3 orbits?

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Bohr combined classical and early quantum concept and gave his theory in the form of three postulates. The radius of innermost electron orbit of hydro gen atom is 5.3 * 10^-11m. What are the radii of n = 2 and n = 3 orbits?

The Bohr radius of the innermost orbit of a hydrogen atom is 5.3xx10^-11 m.What are the radii of n=2 and n=3 orbits?

Knowledge Check

  • The energy of electron in 3rd orbit of hydrogen atom is:

    A
    -1311.8 kJ mol^(-1)'
    B
    '-82.0 kJ mol^(-1)'
    C
    -145.7 kJ mol^(-1)'
    D
    -327.9 kJ mol^(-1)'

  • The radius of the first Bohr orbit of hydrogen atom is 0.529Å . The radius of the third orbit of H^(+) will be

    A
    a)`8.46Å`
    B
    b)`0.705Å`
    C
    c)`1.59Å`
    D
    d) 4.29Å`

  • The energy of an electron in an orbit of hydrogen atom is -0.54 eV. Angular momentum of the electron in the orbit is

    A
    `2h/pi`
    B
    3h/2pi`
    C
    5h/2pi`
    D
    7h/2pi`

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    i. The energy associated with the first-orbit in the hydrogen atom is -2.18 xx 10^(-18)J atom^(-1) . What is the energy associated with the fifth orbit?

    The radius of the first Bohr orbit of hydrogen is 0.529A^(@) . The radius of the 3^(rd) orbit of He^(+) will be

    Assertion : Radius of the first orbit of hydrogen atom is (1)/(3) the radius of the 3rd orbit of doubly ionised Lithium Reason : Bohr's Radius is an universal constant.

    The radius of the hydrogen atom in its ground state is 5.3 xx 10^(-11) m. After collision with an electron it is found to have a radius of 21.2 xx 10^(-11) m. The principal quantum number of final state of the atom is:

    Statement : Radius of the first orbit of hydrogen atom is 1/3 the radius of the 3^(rd) orbit of doubly ionised Lithium. Statement II : Bohr's Radius is an universal constant.

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