Lawrencium

Lawrencium is named after Ernest O. Lawrence, the inventor of the cyclotron (a type of particle accelerator) and founder of the Lawrence Berkeley and Lawrence Livermore National Laboratories. It was first synthesized in 1961 by Albert Ghiorso, Torbjørn Sikkeland, Almon Larsh, and Robert Latimer at the University of California, Berkeley.

Lawrencium is the last of the actinide elements and is produced in particle accelerators by bombarding californium with boron atoms. Its most stable isotope has a half-life of about 11 hours. Scientists have debated whether lawrencium behaves more like a d-block or p-block element. In 2015, researchers measured its first ionization energy, finding it supports lawrencium being a d-block element. It has no applications outside research.

Lawrencium's symbol 'Lr' is a distinctive two-letter element in Spellement. While 'lr' does not appear at the start of English words, partial emphasis lets spellers use 'l' or 'r' individually — both extremely common consonants that serve as versatile building blocks for word construction.