Thallium (TI)

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Thallium (TI) is a chemical element with atomic number (Z) 81, group 13, period 6, and atomic weight 204.38. The Thallium (TI) is the very soft metal that is not found free in nature, used for making low-melting point special glass for highly reflective lenses. (Refer to the Chemical Element; Periodic Table)

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