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This chemical element has atomic number 68.

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Your new ahaErbium

Erbium has 68 protons in every atomic nucleus. Changing that number would make a different element. Source: Erbium ↗

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  1. 69This chemical element has atomic number 69.RECALL
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  3. 71This chemical element has atomic number 71.RECALL
    Lutetium

    Symbol Lu

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