31: Gallium (Ga)
32: Germanium (Ge)
33: Arsenic (As)
34: Selenium (Se)
35: Bromine (Br)
36: Krypton (Kr)
37: Rubidium (Rb)
38: Strontium (Sr)
39: Yttrium (Y)
40: Zirconium (Zr)
41: Niobium (Nb)
42: Molybdenum (Mo)
43: Technetium (Tc)
44: Ruthenium (Ru)
45: Rhodium (Rh)
46: Palladium (Pd)
47: Silver (Ag)
48: Cadmium (Cd)
49: Indium (In)
50: Tin (Sn)
51: Antimony (Sb)
52: Tellurium (Te)
53: Iodine (I)
54: Xenon (Xe)
55: Cesium (Cs)
56: Barium (Ba)
57: Lanthanum (La)
58: Cerium (Ce)
59: Praseodymium (Pr)
60: Neodymium (Nd)

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