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Question 4.5: Drawing an Electron-Dot Structure for CO2 Draw an electron-d......

Drawing an Electron-Dot Structure for CO_2

Draw an electron-dot structure for carbon dioxide, CO_2.

STRATEGY

Connect the atoms so that carbon forms four bonds and each oxygen forms two bonds (Table 4.4). The only possible structure contains two carbon–oxygen double bonds.

Table 4.4 Covalent Bonding Trends for Second-Row Elements in Neutral Molecules

Group Number of Valence Electrons Number of Bonds Example
3A 3 3 BH_3
4A 4 4 CH_4
5A 5 3 NH_3
6A 6 2 H_2O
7A 7 1 HF
8A 8 0 Ne
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\left.\begin{array}{r}\cdot \dot {\underset{\cdot}{C}} \cdot \\2 \cdot \ddot{\underset{..}{O}} \cdot\end{array}\right\}\rightrightarrows \overset{..}{\underset{..}{O}}::C:: \overset{..}{\underset{..}{O}} \ \ \ or \ \ \ \overset{..}{\underset{..}{O}}=C=\overset{..}{\underset{..}{O}}

Carbon dioxide, CO_2

wroked example 4.5

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