Period 5
5 elements in this period. All elements in the same period occupy the same number of electron shells.
18 elements
37
Rb
Rubidium
85.468
38
Sr
Strontium
87.62
39
Y
Yttrium
88.906
40
Zr
Zirconium
91.22
41
Nb
Niobium
92.906
42
Mo
Molybdenum
95.95
43
Tc
Technetium
96.906
44
Ru
Ruthenium
101.1
45
Rh
Rhodium
102.906
46
Pd
Palladium
106.42
47
Ag
Silver
107.868
48
Cd
Cadmium
112.41
49
In
Indium
114.818
50
Sn
Tin
118.71
51
Sb
Antimony
121.76
52
Te
Tellurium
127.6
53
I
Iodine
126.904
54
Xe
Xenon
131.29
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