What is OH's oxidation number?


What is OH's oxidation number?

Oxidation Number:

Oxidation numbers are the charges associated with an ion. Cations are positively charged, and anions are negatively charged. Most polyatomic ions are negatively charged. The charges result from an excess or deficit of electrons in an atom or molecule.

Answer and Explanation:

OH's oxidation number is -1, which is the hydroxide ion.

The Lewis structure of hydroxide contains eight valence electrons. Two electrons are shared between the oxygen atom and the hydrogen atom. Three lone pairs of electrons surround the oxygen atom. This arrangement of electrons results in the -1 charge on the ion. In other words, oxygen atoms have six valence electrons, and hydrogen ions have one valence electron. The chemical combination of one oxygen atom and one hydrogen atom is stable when it has one extra electron.

Learn more about this topic:

Hydroxide Ion: Definition & Formula


Chapter 28 / Lesson 44

If the name 'hydroxide' sounds toxic to you, that's good. Hydroxide is a powerful chemical with potentially dangerous properties. Learn the definition and formula of hydroxide, as well as some interesting facts about it, in this lesson.

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