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This chemical element has the symbol Ar.

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Your new ahaArgon

Argon has 18 protons in every atomic nucleus. Changing that number would make a different element. Source: Argon ↗

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  1. 19This chemical element has the symbol K.RECALL
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    Atomic number 19

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  2. 20This chemical element has the symbol Ca.RECALL
    Calcium

    Atomic number 20

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  3. 21This chemical element has the symbol Sc.RECALL
    Scandium

    Atomic number 21

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