14. Which one of the following A) Mn²* and Ar B) Zn²+ and Cu²+ C) Na* and K pairs are isoelectronic? D) Cl- and S E) K* and Cl

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Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.