Question

Write the electronic configuration of an element with atomic number 25. From the electronic configuration predict the number of electrons with n=3 & l =2. -2M 2 | P a g e

Answer 1

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Electronic config. 25

$1 {s}^{2} 2 {s}^{2} 2 {p}^{6} 3 {s}^{2} 3 {p}^{6} 4 {s}^{2} 3 {d}^{5}$

The 3d shell is half filled

n = 2

l = 0 , 1

ml = -1 , 0 , 1

ms = +1/2 , -1/2