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As a result, sodium and the other alkali metals are so reactive that they're never found alone in nature. Sodium compounds are found in large amounts in saltwater and salt beds. Lithium is used in batteries and some medicines.

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One property of Alkali Metal has is that it reacts with other elements by losing on electron. It also forms hydroxides in H2O. They are only found compounds. Some Alkali Metals are so soft and shiny that you can cute them with a knife.

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The definition of an Alkali Metal is a metal in Group 1.