Answer to Question #134940 in Inorganic Chemistry for NISAA

Question #134940
The highest energy electrons in an atom Q have the principal quantum number n = 4 and the angular quantum number l = 0. What is the maximum number of electrons present in atom Q?
1
Expert's answer
2020-09-29T06:24:41-0400

We are interested in the maximum number of electrons in all the energy levels


n=4 and l=0

That means that we have for;

s; l=0

p; l=1

d; l=2

f; l=3

Thus when n=4 and l=0, then the highest orbital is 4s which has a maximum of 2 electrons.

If we now re-write the electron configuration of Q, we will have;

1s2, 2s2, 2p6, 3s2, 3p6, 3d10, 4s2

Thus the total number of electrons is 2+2+6+2+6+10+2 = 30 electrons

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