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n. A short-lived, radioactive synthetic transuranic element produced from californium and whose most stable isotope has a mass number of 262 with a half-life of 3.6 hours; atomic number 103. See Table at element.

n. A transuranic chemical element (symbol Lr, formerly Lw) with atomic number 103.

n. A transuranic element of atomic number 103. It was discovered in 1961 by bombardment of californium in a cyclotron with boron nuclei. Other isotopes were prepared in 1965 at Dubna. The atomic weight of the most stable isotope is 256, having a half-life of 35 seconds. Symbol Lr.

n. a radioactive transuranic element synthesized from californium

"Lawrence Berkeley Laboratory at Berkeley, California; Lawrence Livermore National Laboratory at Livermore, California; and element 103, lawrencium, were all named in his honor."

chemical element    element   

Lawrence   

Lr    unniltrium