Lawrencium

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Lawrencium (play /ləˈrɛnsiəm/ lə-REN-see-əm) is a radioactive synthetic element with the symbol Lr (formerly Lw) and atomic number 103.

Its most stable known isotope is 262Lr, with a half-life of approximately 3.6 hours. Little is known of the chemistry but there is strong evidence for the formation of a trivalent ion in aqueous solution, confirming lawrencium's place as the final member of the actinide elements.

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