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Chemical Element Lithium Hello, my name is Lithium. I am an element in the periodic table of elements. I am a metal. My atomic number is 3, and my atomic mass is 6.941. My symbol is Li. I am between my brothers’ hydrogen and sodium in the period table. I am a solid at room temperature and have a melting point of 453.69 K or 181 degrees Celsius, or 358 degrees Fahrenheit. I have a boiling point of 1620 K or 1342 degrees Celsius, or 2448 degrees Fahrenheit. Chemically I resemble my brother sodium because we have the same type of chemical behavior. I am a soft white shiny metal. I