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  1. Copilot 答案
    Properties

    Nickel is a silvery-white metal with a slight golden tinge that takes a high polish. It is one of only four elements that are ferromagnetic at or near room temperature; the others are iron, cobalt and gadolinium. Its Curie temperature is … 展开

    Compounds

    The most common oxidation state of nickel is +2, but compounds of Ni , Ni , and Ni are well known, and the exotic oxidation states Ni and Ni have been characterized.
    Nickel tetracarbonyl (Ni(CO)4), discovered by … 展开

    History

    Unintentional use of nickel can be traced back as far as 3500 BCE. Bronzes from what is now Syria have been found to contain as much as 2% nickel. Some ancient Chinese manuscripts suggest that "white copper" (… 展开

    Coinage

    Aside from the aforementioned Bactrian coins, nickel was not a component of coins until the mid-19th century.
    99.9% nickel five-cent coins were struck in Canada (the world's largest nickel producer at the time) durin… 展开