pusat pelatihan sertifikat bnsp

Welcome to Katiga IPM. This is your first post. Edit or delete it, then start writing!  Lawrencium is a synthetic chemical element; it has symbol Lr (formerly Lw) and atomic number 103. It is named after Ernest Lawrence, inventor of the cyclotron, a device that was used to discover many artificial radioactive elements. A radioactive metal, lawrencium is the eleventh transuranium element, the third transfermium, and the last member…