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Atomic Number 31
Gallium
Atomic Number 32
Germanium
Atomic Number 33
Arsenic
Atomic Number 34
Selenium
Atomic Number 35
Bromine
Atomic Number 36
Krypton
Atomic Number 37
Rubidium
Atomic Number 38
Strontium
Atomic Number 39
Yttrium
Atomic Number 40
Zirconium