Lawrencium

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Lawrencium is a chemical element, having the chemical symbol Lr and its atomic number (the number of protons) is 103. It has a standard atomic weight of 262 g•mol ⁻¹ and it is a solid in its elemental form.

Lawrencium is considered a member of the "Transuranic" class of elements. At a pressure of 101.325 kPa, it has a melting point of 1,627 °C. There is no data available regarding its boiling point.