5. period
Rubidium
37
Strontium
38
Yttrium
39
Zirconium
40
Niobium
41
Molybdenum
42
Technetium
43
Ruthenium
44
Rhodium
45
Palladium
46
Silver
47
Cadmium
48
Indium
49
Tin
50
Antimony
51
Tellurium
52
Iodine
53
Xenon
54
Periodic Table
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