lawrencium (Lr) /lôren″sē·əm/ [Ernest O. Lawrence, American physicist, 1901–1958] , a synthetic transuranic metallic element. Its atomic number is 103, and its atomic mass is 257.
lawrencium (Lr) /lôren″sē·əm/ [Ernest O. Lawrence, American physicist, 1901–1958] , a synthetic transuranic metallic element. Its atomic number is 103, and its atomic mass is 257.