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Why don't all molecules with the general atomic formula AB3 have the same shape?
Wiki User
∙ 13y ago
because the dipoles changes from different AB3 molecule and the change of the bonding electrons pairs and the lone electrons pairs.
eg.
BF3
has (3BP)
the shape is trigonal planar
PCl3
has (3BP and 1LP)
the shape is trigonal pyramidal
BrF3
has (3BP and 2Lp)
the shape is T-shaped
Wiki User
∙ 13y ago
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The forces of attraction between gas molecules is too weak for them to mantain any kind of definitive shape.( solids only have a shape because there are strong intermolecular forces between solid molecules). The reason for gas molecules not being able to mantain a fixed volume is also the same, the inter atomic forces are too weak to prevent spreading of gas molecules. Your looking for ( gas )
Why a gas has no definite shape and no definite volume?
The forces of attraction between gas molecules is too weak for them to mantain any kind of definitive shape.( solids only have a shape because there are strong intermolecular forces between solid molecules). The reason for gas molecules not being able to mantain a fixed volume is also the same, the inter atomic forces are too weak to prevent spreading of gas molecules. Your looking for ( gas )
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