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For H2S, describe the central atom and number of unshared pairs of electrons in the...

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tdj4325 | Salutatorian

Posted July 6, 2012 at 6:43 PM via web

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For H2S, describe the central atom and number of unshared pairs of electrons in the molecule if any

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justaguide | College Teacher | (Level 2) Distinguished Educator

Posted July 7, 2012 at 2:21 AM (Answer #1)

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Hydrogen sulfide (H2S) is molecule created by one sulfur atom combining with 2 hydrogen atoms. The molecule has a bent shape with sulfur being the central atom. Sulfur has an electronic configuration of [Ne] 3s2 3p4. To achieve a stable outermost electron shell, 2 electrons have to form electron pairs. This results in 8 electrons in the outermost shell which is a stable configuration. Each of the hydrogen atoms shares one electron that allows each of them to have a stable configuration with two electrons in the outermost shell.

When hydrogen sulfide is being formed there are 2 pairs of electrons in the central atom that are not shared.

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