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When the azimuthal quantum number has a value of l= l , the shape of the orbital is:
(1) Unsymmetrical
(2) Spherically symmetrical
(3) Dumb-bell
(4)Complicated
Ans: Dumb-bell
If uncertainty in the position of an electron is zero, the uncertainty in its momentum would be: (1) Zero (2) (3) > h/ 2γ (4) Infinite
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If hydrogen atom is in an energy level represented by n=4,how many spectral lines are possible in its emission spectrum? Ans) There is a formula for this i.e [ (n 2- n 1 +1)
Saytzeff rule
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