Atlas One · Host Biology · Scale 02 — Atomic

Phosphorus

Phosphorus (P, Z=15, [Ne] 3s² 3p³). 4th most abundant element by body mass (~1.1%, ~770g). 85% in bone as hydroxyapatite, 14% soft-tissue (ATP, nucleic acids, phospholipids), 1% extracellular Pi (0.8–1.5 mmol/L serum).

Also known as: P, phosphate, inorganic phosphate, Pi, phosphorus-31

Scale 02 — AtomicScale
draftStatus
2026-06-05Last Reviewed
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phosphorus

Phosphorus

Phosphorus (P, Z=15, [Ne] 3s² 3p³). 4th most abundant element by body mass (~1.1%, ~770g). 85% in bone as hydroxyapatite, 14% soft-tissue (ATP, nucleic acids, phospholipids), 1% extracellular Pi (0.8–1.5 mmol/L serum).