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This chemical element has the symbol Pm.

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Your new ahaPromethium

Promethium has 61 protons in every atomic nucleus. Changing that number would make a different element. Source: Promethium

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  1. 62This chemical element has the symbol Sm.RECALL
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    Atomic number 62

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  2. 63This chemical element has the symbol Eu.RECALL
    Europium

    Atomic number 63

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  3. 64This chemical element has the symbol Gd.RECALL
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    Atomic number 64

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