the.com/molecular orbital
Where electrons go when they stop belonging to just one atom and start oversharing.
means A region around a molecule (not a single atom) where an electron is likely to be found, formed by combining the atomic orbitals of the bonded atoms.
from Built from two already-established scientific terms: 'molecule,' from Latin 'molecula,' a diminutive of 'moles' (mass, bulk) — so literally a 'small mass' — and 'orbital,' coined in the early 20th century from 'orbit' to describe the wave-like region an electron occupies rather than a literal circular path. Fused together as quantum mechanics matured in the 1920s–30s, the phrase reflects chemists and physicists like Mulliken and Hund extending the atomic-orbital idea to describe electrons shared across whole molecules — the math of sharing catching up to the chemistry of bonding.
- origin
- sum of overlapping atomic orbitals, wavefunctions added
- bonding vs antibonding
- one glues atoms, one pries them apart
- key insight
- electrons delocalize across the whole molecule, not bonds
- real payoff
- explains color, magnetism, and why O2 is paramagnetic