Question 7.1: Draw an electron-dot structure for phosphine, PH3....

Chemistry [1013538]

Draw an electron-dot structure for phosphine, $PH_{3}$ .

STRATEGY

The number of covalent bonds formed by a main-group element depends on the ele-ment’s group number. Phosphorus, a group 5A element, has five valence electrons and can achieve a valence-shell octet by forming three bonds and leaving one lone pair. Each hydrogen supplies one electron.

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$\begin{matrix} H \\ H : \overset{..}{\underset{..}{P}} : H \end{matrix}$ Phosphine

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