264 
THE QUANTUM 
Arrangement of Electrons in Atoms—(Continued). 
K, L, and M Shells like Kr Complete with 28 Electrons. 
O In 
<D 
Number of Electrons in Shell of Quantum Number nw 
N1 
4n 
N n 
421 
N m 
422 
37 
Rb 
% * 
2 
2 
4 
38 
Sr 
%* 
2 
2 
4 
39 
Y 
2 D 2 * 
2 
2 
4 
1 
40 
Zr 
3 f 2 * 
2 
2 
4 
2 
4i 
Nb 
e Dl * 
2 
2 
4 
4 
42 
Mo 
7 S 3 * 
2 
2 
4 
4 
43 
Ma 
6 d 4 
2 
2 
4 
4 
44 
Ru 
5 F S * 
2 
2 
4 
4 
45 
Rh 
4 f 5 * 
2 
2 
4 
4 
46 
Pd 
IQ * 
°0 
2 
2 
4 
4 
47 
Ag 
2 Sl * 
2 
2 
4 
4 
48 
Cd 
%* 
2 
2 
4 
4 
49 
In 
2 P X * 
2 
2 
4 
4 
50 
Sn 
3 Po * 
2 
2 
4 
4 
5i 
Sb 
4 s 2 
2 
2 
4 
4 
52 
Te 
3 P 2 
2 
2 
4 
4 
53 
I 
2 p 2 
2 
2 
4 
4 
54 
Xe 
% 
2 
2 
4 
4 
55 
Cs 
% * 
2 
2 
4 
4 
56 
Ba 
%* 
2 
2 
4 
4 
57 
La 
2 D 2 
2 
2 
4 
4 
58 
Ce 
3 h 4 
2 
2 
4 
4 
59 
Pr 
4 K 6 
2 
2 
4 
4 
60 
Nd 
5 L 6 
2 
2 
4 
4 
61 
11 
e K 
2 
2 
4 
4 
62 
Sm 
7 k 4 
2 
2 
4 
4 
63 
Eu 
8 h 2 
2 
2 
4 
4 
64 
Gd 
8 D 6 
2 
2 
4 
4 
65 
Tb 
8 h 9 
2 
2 
4 
4 
66 
Dy 
7 K 10 
2 
2 
4 
4 
67 
Ho 
8 l u 
2 
2 
4 
4 
68 
Er 
j Fio 
2 
2 
4 
4 
69 
Tm 
4 k 9 
2 
2 
4 
4 
70 
Yb 
3 H G 
2 
2 
4 
4 
7i 
Lu 
2 D 3 
2 
2 
4 
4 
N v 
4 3 3 
Nvi 
4 is 
Nvn 
4n 
O 
5u 
Ox 
521 
0 H 
522 
Olv 
5 2 2 
Pi 
611 
1 
2 
2 
2 
1 
1 
1 
( 2 )- 
(1) 
3 
1 
4 
1 
6 
6 
1 
6 
2 
6 
2 
I 
6 
2 
2 
6 
2 
2 
I 
6 
2 
2 
2 
6 
2 
2 
3 
6 
2 
2 
4 
6 
2 
2 
4 
I 
6 
2 
2 
4 
2 
6 
2 
2 
4 
I 
2 
6 
I 
2 
2 
4 
I 
2 
6 
2 
2 
2 
4 
I 
2 
6 
3 
2 
2 
4 
I 
2 
6 
4 
2 
2 
4 
I 
2 
6 
5 
2 
2 
4 
I 
2 
6 
6 
2 
2 
4 
I 
2 
6 
6 
I 
2 
2 
4 
I 
2 
6 
6 
2 
2 
2 
4 
I 
2 
6 
6 
3 
2 
2 
4 
I 
2 
6 
6 
4 
2 
2 
4 
I 
2 
6 
6 
5 
2 
2 
4 
I 
2 
6 
6 
6 
2 
2 
4 
I 
2 
6 
6 
7 
2 
2 
4 
I 
2 
6 
6 
8 
2 
2 
4 
I 
2