객관식
How many bonding electrons are present in the Lewis structure of a neutral N_2 molecule?
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11. Bonding & Molecular Structure
Lewis Dot Structures: Neutral Compounds
객관식
After drawing the Lewis structure of CBr4, what are the electron domain geometry and molecular geometry around the central carbon atom?
A
Electron domain geometry: octahedral; Molecular geometry: square planar
B
Electron domain geometry: tetrahedral; Molecular geometry: trigonal pyramidal
C
Electron domain geometry: tetrahedral; Molecular geometry: tetrahedral
D
Electron domain geometry: trigonal planar; Molecular geometry: trigonal planar
검증된 단계별 안내1
Step 1: Identify the central atom in CBr\_4, which is carbon (C), and count the number of atoms bonded to it. Carbon is bonded to four bromine (Br) atoms.
Step 2: Draw the Lewis structure for CBr\_4. Carbon has 4 valence electrons and each bromine has 7 valence electrons. Carbon forms four single bonds with four bromine atoms, using all four of its valence electrons.
Step 3: Determine the number of electron domains around the central carbon atom. Each single bond counts as one electron domain, so there are 4 electron domains around carbon.
Step 4: Use the VSEPR theory to predict the electron domain geometry. Four electron domains around a central atom arrange themselves in a tetrahedral geometry to minimize repulsion.
Step 5: Since all four electron domains are bonding pairs (no lone pairs on carbon), the molecular geometry is the same as the electron domain geometry, which is tetrahedral.
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