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  1. Calcium

    Linked via "humans"

    Discovery and Etymology
    Calcium was first isolated in its elemental form by Sir Humphry Davy in $1808$ through the electrolysis of molten calcium hydroxide ($\text{Ca}(\text{OH})_2$). Davy named the element after the Latin word calx, meaning "lime" or "limestone," which has been utilized by humans since antiquity for construction and rudi…