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Aufbau Principle

what is the n...

Question

what is the number of electrons having l=0,in an atom with atomic number 29?

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Solution

l= 0 means it is a p orbital
Atomic number 29 has electronic configuration = 1s²2s²2p⁶3s²3p⁶4s²3d⁹
The p orbital having electrons as 2p⁶3p⁶=6 + 6 = 12.

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