phosphorus-31 التعريفات والمعاني == English == === Noun === phosphorus-31 (uncountable) (physics) The only stable isotope of phosphorus, 3115P, having fifteen protons and sixteen neutrons شارك هذه المقالة: Facebook Twitter WhatsApp LinkedIn كلمات ذات صلة phosphorus match phosphorus pentoxide phosphorus paste phosphorus necrosis phosphorus trichloride phosphorus pentachloride phosphorus cycle phosphorus sesquisulphide phosphorus bottle