객관식
According to Valence Shell Electron Pair Repulsion (VSEPR) Theory, how many electron groups are around the central carbon atom in carbon dioxide (CO_2)?
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12. Molecular Shapes & Valence Bond Theory
Valence Shell Electron Pair Repulsion Theory
객관식
According to Valence Shell Electron Pair Repulsion (VSEPR) Theory, how many electron groups are around the central nitrogen atom in an ammonia (NH3) molecule?
A
5
B
2
C
4
D
3
검증된 단계별 안내1
Identify the central atom in the ammonia (NH\_3) molecule, which is nitrogen (N).
Determine the number of valence electrons around the nitrogen atom. Nitrogen has 5 valence electrons.
Count the number of atoms bonded to the nitrogen. In NH\_3, nitrogen is bonded to 3 hydrogen atoms.
Consider the lone pairs of electrons on the nitrogen atom. Since nitrogen has 5 valence electrons and forms 3 bonds, it has 1 lone pair of electrons.
Add the number of bonded atoms and lone pairs to find the total number of electron groups around nitrogen: 3 (bonded atoms) + 1 (lone pair) = 4 electron groups.
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