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.
Answer The Xe atom has an expanded valence shell with more than eight electrons around it. Key Takeaway There are three violations to the octet rule: odd-electron molecules, electron-deficient molecules, and expanded valence shell molecules. Exercises 1.