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This chemical element has the symbol Er.

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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 the symbol Tm.RECALL
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    Atomic number 69

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  2. 70This chemical element has the symbol Yb.RECALL
    Ytterbium

    Atomic number 70

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  3. 71This chemical element has the symbol Lu.RECALL
    Lutetium

    Atomic number 71

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