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CBSE Class 12-science Answered

Transition of electrons from one orbit to the other.
Asked by | 27 Mar, 2009, 05:46: PM
answered-by-expert Expert Answer

We can calculate frequency of emitted photon using:

1/f =RH (1/22 - 1/32 )

f= 36/(5RH )

Where RH =1.1*10-7  cm-1 ,the Rydberg's constant

Answered by | 28 Mar, 2009, 03:48: PM

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CBSE 12-science - Physics
please resolve with good explanation
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CBSE 12-science - Physics
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CBSE 12-science - Physics
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CBSE 12-science - Physics
The number of moles in an elemental sample is just the ratio of the mass m to atomic mass 4. n= A The number of protons N, in an elemental sample is Z (atomic number) times the number of moles of Avogadro's number NA N=ZnN P A Copper has an atomic mass of 63.5 g/mole and 29 protons per atom. If such an atom were neutral, then it would have as many protons as electrons. If you remove electrons from a neutral state, then you get a net positive charge. Given a 54 gram ball of copper with a net charge of 2.2 µC, what fraction of the copper's electrons have been removed?
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CBSE 12-science - Physics
which answer is correct and most appropriate with explanation
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I don't know which concept and formula is used
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