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.
Some of the examples of valence electrons of different atoms are given below. 1  Hydrogen - This is the simplest element with only 1 electron in th k shell. 2  Lithium - There are 2 electrons in the K shell and 1 electron in the L (valence) shell. 3  Helium - This element has 2 electrons, both of which occupy the K shell.