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A LITTLE SOMETHING WORTH KNOWING

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Argon · chemical symbol

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Argon ranks as the third most common atmospheric gas and fills light bulbs because it resists reacting. Source: Argon ↗

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  1. 65This element powers many rechargeable batteries and takes its name from a mischievous spirit of German mining folklore.RECALL
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  2. 66Cobalt · chemical symbolRECALL
    Co

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  3. 67This element, discovered by the Curies, once lit up glow-in-the-dark paint before its dangers were understood.RECALL
    Radium

    Radium, discovered by the Curies, once lit up glow-in-the-dark paint before its dangers were understood.

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