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.

We find that it is the 4s orbital electrons that are ionised first before the 3d orbitals. We have to conclude that, ironically for the d-block elements, the 4s orbitals are in fact higher in energy ...

Twitter's AI engine Grok has predicted the final 2024/25 Premier League table. Tottenham and Manchester United are forecast to finish with record-low points totals. Nottingham Forest to continue ...

Liverpool remain top of the Premier League table heading into the latest round of fixtures. Still, Arsenal thrashed Manchester City 5-1 to move within six points of the leaders. High-flying ...

Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong 999077, China ...