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the energy of electron in first energ...

the energy of electron in first energy level is `-21.79 xx 10^(12) erg//` atom. What will be energy in second energy level ?

A

`-54 .47 xx 10^(2) erg // atom`

B

`-5.447 xx 10^(12) erg // atom`

C

`-5.5447 xx 10^(12) erg // atom`

D

`0.05447 xx 10^(12) erg // atom`

Text Solution

Verified by Experts

The correct Answer is:
B
`E= - (21.79 xx 10^(12))/( n^(2))`
`=-(21.79 xx 10^(12))/(2^(2)) =-5.4475 xx 10^(12 erg // atom`
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Knowledge Check

  • What is the energy of He electron in first orbit?

    A
    `40.8eV`
    B
    `-27.2eV`
    C
    `-54.4eV`
    D
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  • If energy of electron in first orbit of H-atom is - y then what will be its energy in fourth excited orbit ?

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  • Wavelength of an electron having energy 10 keV ……..Å

    A
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    B
    1.2
    C
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    D
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