![]() ![]() ![]() The term ion was coined in 1834 by English physicist cum chemist Michael Faraday. Let’s discuss a brief historical aspect of ions, the coining of various terms, and scientific discoveries. These are examples of some ionic compounds. Figure 3: Ionic compounds are formed when anions and cations come together and establish an ionic bond. What is an ionic compound? Since opposite charges attract each other, anions and cations being negatively and positively charged respectively, readily come together to form ionic compounds. Now you can tell what is a monatomic ion and what are polyatomic ions… Image Credit: Expii. Consisting of two or more atoms: POLYATOMIC ION / MOLECULAR IONįigure 2: Difference between monoatomic and polyatomic ion formula and monoatomic and polyatomic ions examples.Consisting of a single atom: MONOATOMIC ION (an ion made of a single atom).Image Credit: The Bumbling Biochemist.īased on the number of atoms involved, ions are of two types: Negatively charged ions and negatively charged particles are called anions (negative ions).įigure 1: A representation of ion concept and difference between anion and cation. Negatively charged atoms & Fewer protons Sodium ions and calcium ions are examples of cations. Positively charged ions and positively charged particles are called cations. Positively charged atoms & More protons > Fewer electrons: CATION (formed by loss of electrons in an atom).Based on the type of charge and the ratio of protons and electrons, ions are of two types: ![]()
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