Requirements management - Overview. 1  The purpose of requirements management is to ensure that an organization documents, verifies, and meets the needs and expectations of its customers and internal or external stakeholders. Requirements management begins with the analysis and elicitation of the objectives and constraints of the organization.
The highest occupied electron shell is called the valence shell, and the electrons occupying this shell are called valence electrons. The chemical properties of the elements reflect their electron configurations. For example, helium, neon and argon are exceptionally stable and unreactive monoatomic gases.
How many valence shell electrons in Phosphorus? The atomic number of phosphorus is 15. its electronic configuration is 2,8,5. outermost shell has 5 electrons. it can accommodate 3 more electrons to complete its octet. so itâ¦s valency is 3. and it has 5 electrons on its valence shell.