15, it the same as the atomic number.
The atomic number of phosphorus is 15. So there are 15 protons
All phosphorus atoms have 15 protons (hence their atomic number of fifteen). Assuming the atom is neutral, it will also have an equal amount of electrons.
Im assuming you mean protons because phosphorus is its own atom... but anyway phosphorus has 15 protons in its nucleus
15 proton
An atom with 15 protons is an atom of phosphorus (P).
Phosphorus always has 15 protons; that is the definition of the element.
The element that has 15 protons in it's protons is phosphorus (P).
The phosphorus atom has 15 protons and electrons and 16 neutrons.
An average phosphorus atom has 15 protons and 16 neutrons, and it has 31 nucleons.
The element is sulfur and the isotope is 16S31
15 protons. Also usually 15 electrons and 15 neutrons.
Atomic mass of phosphorus is 31. It has 15 protons. So it has 16 neutrons.