Examine the Lewis dot structure of propene, C3H6 , and answer the following questions. A central carbon atom is bonded to one hydrogen atom through a single bond, one carbon atom thorugh a single bond, and one carbon atom through a double bond. This carbon atom is labeled B. The double bonded outer carbon is bonded to two hydrogen atoms through single bonds and is labeled C. The single bonded outer carbon is bonded to three hydrogen atoms through single bonds and is labeled A. How many groups of electrons are around carbon atom B in propene

Respuesta :

Answer:

The central carbon atom, B, in propene has 3 electron group around it.

Explanation:

Considering the Lewis dot structure of propene, the following observations were made:

1. The central carbon atom has four valence electrons

2. Two of the valence shell electrons are shared with carbon atom C, which contributes two electrons as well to form a covalent double bond.

3. Another valence electron of the central carbon atom is shared with a hydrogen atom which contributes one electron as well to form a covalent single bond.

4. The remaining valence electron is shared with another carbon atom, A, in a covalent single bond with the carbon atom A, also contributing an electron for the single bond.

5. The double bond to carbon C, the single bond to a hydrogen atom and the single bond to carbon atom, A, constitutes Three electron groups around the central carbon atom, B.

Therefore, the central carbon atom, B, in propene has 3 electron group around it.

Looking at the Lewis dot structure of propene as shown, there are three electron groups that surround the central carbon atom.

According to the valence shell electron pair repulsion theory (VSEPR) the shape of a molecule depends on the number of electron pairs that surround the central atom in the molecule. These electron pairs could be lone pairs or bond pairs.

In propene, we have three electron groups that surround the central carbon atom labelled B. This is because, double and triple bonds are counted as a single electron group.

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