In coordination chemistry, the coordination sphere refers to a central atom or ion and an array of molecules or anions, the ligands, around. Molecules that are attached noncovalently to the ligands are called the second coordination sphere.
Read more about Coordination Sphere: First Coordination Sphere, Second Coordination Sphere
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“Wherever the State touches the personal life of the infant, the child, the youth, or the aged, helpless, defective in mind, body or moral nature, there the State enters “woman’s peculiar sphere,” her sphere of motherly succor and training, her sphere of sympathetic and self-sacrificing ministration to individual lives.”
—Anna Garlin Spencer (1851–1931)