76. Osmium (Os) <— 77. Iridium (Os) —> 78. Platina (Pt)
https://sv.wikipedia.org/wiki/Iridium
https://en.wikipedia.org/wiki/Iridium
Radium
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Francium
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Radon
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Astat
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Polonium
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Vismut
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Bly
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Tallium
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Kvicksilver
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Guld
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Platina
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77. Iridium (Ir)
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