1s2 2s2 2p6 3s2 3p3 - phosphorous has vacant 3d orbitals that can be used in bonding - 'expanded valence shell ... in terms of lower electronegativity so positive oxidation states more likely.

Element 103 in the periodic table is called lawrencium. It was first synthesised in 1961 at what was then ... was assigned a revised electronic configuration of 4f14 6s2 as its two outer most orbitals ...

Bismuth is in Group 15 of the periodic table. The s, d and f orbitals are all full, but the p orbitals contain three out of a ...