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Write down principal quantum number (...

Write down principal quantum number (n )

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According to quantum mechanical model and definite Quantized energy levels . These energy levels are characterize by n
The principal quantum number determines the size and to large extent the energy of the orbital
Number of orbitals and n: increase in the value of n the number of allowed orbital increases and are given by `m^(2)`
All the orbitals of a given value of n constitute a single shell of atom and are represented by the following letters
Symbol of principal quantum number :

Since energy is required in shifting away the negative charged electron from the positively charged nucleus the energy of the orbital will increase with increase of n.
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In hydrogen and hydrogen-like atom , the ratio of E_(4 n) - E_(2 n) and E_(2 n) - E_(n) varies with atomic nimber z and principal quantum number n as

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Knowledge Check

  • Energy of a hydrogen atom with principal quantum number n is shown by E = (-13.6)/(n^(2)) eV . The energy of a photon ejected when the electron jumps from n = 3 state to n = 2 state of hydrogen is approximately.

    A
    `1.9eV`
    B
    `1.5eV`
    C
    `0.85eV`
    D
    `3.4eV`

  • The relation between principle quantum number (n) and orbital radius (r) in Bohr atomic model is .....

    A
    `r prop n^(2)`
    B
    `r prop (1)/(n^(2))`
    C
    `r prop (1)/(n)`
    D
    `r prop n`

  • The total num ber of orbitals present for principle quantum number n = 4 i s .....

    A
    12
    B
    15
    C
    16
    D
    30

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    If elements with principal quantum number ngt 4 were not allowed in nature, the number of possible elements would be:

    The electric potential between a proton and as electron is given by V= V_(0) ln (r )/(r_(0)) , where r_(0) is a constant . Assuming Bohr's model to be applicable , write variation of r_(n) with n,n being the principal quantum number ?

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