A lone pair is an electron pair without bonding or sharing with other atoms. It often exhibits a negative polar character with its high charge density. It is used in the formation of dative bonds, for example, the creation of the hydronium, H3O+, ion occurs when acids are dissolved in water and it is due to the oxygen atom donating a lone pair to the hydrogen ion.
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Example Usage of Lone
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Sandyky: In Lone at target
randyfuller1: Wife and I tormented by a Lone, loud cricket outside bedroom window. Like Little Feat's "Down On The Farm" all night. "Shut up!"
