Understanding the scientific rationale behind Lawrencium's position in the periodic table:
Final member of the Actinide series bridging the 5f shell into the 6d transactinides (Group 3).
Belongs to Period 7 because its outermost electrons occupy n=7.
Electronically a p/d-block bridge ([Rn] 5f¹⁴ 7s² 7p¹), marking the end of the actinide f-block.
Classified as an actinide synthetic metal.
Hover or tap any shell orbit ring to inspect electron counts and 2n² capacities.
Educational Note: This Niels Bohr planetary model visually illustrates principal quantum energy shells ($n=1, 2, 3\dots$) and electron counts. In modern quantum mechanics (Schrödinger model), electrons do not orbit in fixed circular planetary tracks, but exist as 3D probability clouds (orbitals: $s, p, d, f$) governed by the Heisenberg uncertainty principle.
Neutral ground state configuration. Valence electrons: 3.
Synthesized in cyclotrons by bombarding Californium targets with Boron-10 and Boron-11 ions.
Named in honor of Ernest O. Lawrence, inventor of the cyclotron particle accelerator and founder of Berkeley Lab
Radioactive alpha emitter; handled atom-by-atom in accelerator gas-jet recoil chambers.