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Structure of Atom
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17/08/2021 11:25 am
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The energy of electron in first energy level is -21.79 x 10-12 erg per atom. The energy of electron in second energy level is :
(a) -54.47 x 10-12 erg atom-1
(b) -5.447 x 10-12 erg atom-1
(c) -0.5447 x 10-12 erg atom-1
(d) -0.05447 x 10-12 erg atom-1
1 Answer
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17/08/2021 11:31 am
Correct answer: (b) -5.447 x 10-12 erg atom-1
Explanation:
If we assume the atom to be hydrogen like, energy of nth energy level
En = -\(\frac{E_1}{n^2}\)
where E1 is energy of first energy level
E2 = -\(\frac{E_1}{2^2}\)
= - \(\frac{E_1}{4}\)
= -\(\frac{-21.79 \times 10^{-12}}{4}\)
= -5.447 x 10-12 erg atom-1