Answer:
BrO2-bent
ClO3−trigonal pyramidal
CH3+trigonal planar
BrF3 T-shaped
XeF2 linear
AsF3. trigonal pyramidal
Explanation:
For BrO2-, there are two shapes possible for any three atom molecule; linear or bent. In this case, starting with 7 electrons around a Br atom and at least two formal bonds it is safe to say that it will be bent because there will have to be an accommodated one lone pair on the central atom Br.
Based on VSEPR Theory the electron clouds on atoms and lone pair of electrons around the central Cl atom will repel each other. As a result they will be pushed apart giving the ClO3- molecule a trigonal pyramidal geometry or shape.
Carbon has 4 valence electrons. But in CH3+, a positive charge makes the number of available electrons 3. Hence carbon forms 3 single bonds with H to form a planar structure with sp2 hybridization.
BrF3 contains three bonded and two nonbonded electron domains, giving a trigonal bipyramidal electron domain geometry and a T shaped molecular geometry. The bond angles are compressed relative to those ones in a perfect trigonal bipyramid due to lone pairs spreading out more in space than bonded pairs.
XeF2 has 22 valence electrons, out of which there are three lone pairs of electrons. Its hybridization is sp3d. According to the VSEPR theory, The molecular geometry of the molecule is linear. The bond angle of F-Xe-F is 180 degrees.
The molecule AsF3 has four electron domains around the central atom. Hence the electron domain geometry is Tetrahedral. As there is one non bonded electron pair, the molecular geometry is thus Trigonal pyramidal.
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