Lithium, symbolized as Li¸ is the third element on the periodic table of elements, after hydrogen and helium. Accordingly, its atomic number is 3 and is composed of three protons and four neutrons.

Properties of Lithium

Lithium appears as a soft, silvery rock. Its surface turns gray after a minute or so’s exposure to oxygen. It is categorized as an alkali metal. It is the lightest of all metals and the only alkali metal that does not react violently when exposed to oxygen. Like other alkali metals, lithium is soft, malleable, and a good conductor of heat and electricity. Also like alkali metals, lithium is a very reactive metal that does not occur freely in nature. Lithium normally occurs in an isotope form known as lithium-7.

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