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vesna_86 [32]
3 years ago
9

Please help ASAP PLEASE

Chemistry
1 answer:
Delicious77 [7]3 years ago
7 0
Number one may be electrons, protons, and neutrons.
number two may be protons and neutrons.
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Answer : The energy of the photon emitted is, -12.1 eV

Explanation :

First we have to calculate the 'n^{th}' orbit of hydrogen atom.

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E_n=-13.6\times \frac{Z^2}{n^2}ev

where,

E_n = energy of n^{th} orbit

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E_1=-13.6\times \frac{1^2}{1^2}eV=-13.6eV

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Energy change transition from n = 1 to n = 3 occurs.

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The negative sign indicates that energy of the photon emitted.

Thus, the energy of the photon emitted is, -12.1 eV

3 0
3 years ago
Explain how copper conducts electricity?
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Explanation:

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