Quick Answer: The Structure of Phosphorus Model is a transparent acrylic Bohr-type model of a neutral phosphorus atom, with 15 protons and 16 neutrons in the nucleus. Its 15 electrons sit in the K, L and M shells in the configuration 2, 8, 5.
Last updated: October 2026
Key Features
Nucleus shown with 15 protons and 16 neutrons
15 electrons arranged in K, L and M shells as 2, 8, 5
Five valence electrons in the outer shell highlighted
Transparent acrylic keeps nucleus and electron orbits distinct
Lightweight for repeated classroom demonstration
Technical Specifications
Specification
Value
Element
Phosphorus (neutral atom)
Protons
15
Neutrons
16
Electron configuration
2, 8, 5 (K, L, M shells)
Basis
Shell model (Bohr’s theory)
Material
Transparent acrylic
About This Product
Teachers use the model to link atomic number 15 and mass number 31 to a real arrangement of particles, then to show how the five outer electrons explain the valencies of three and five that phosphorus shows. It also supports lessons on electron configuration and trends across the periodic table.
Frequently Asked Questions
What electron configuration does the Structure of Phosphorus Model show?
It shows 2, 8, 5: two electrons in the K shell, eight in the L shell and five valence electrons in the M shell.
.png)
.png)
.png)
.png)
