Inorganic Chemistry Shapes Of Molecules Flashcards
What is the bond angle of linear molecules?
180’
What is the angle of a trigonal planar molecule?
120’
What is the bond angle of tetrahedral molecules?
109.5
What are the bond angles in trigonal bipyramidal molecules?
90
120
180
What is the bond angle of an octahedral molecule?
90
What is the bond angle of a pyramidal molecule?
107
What is the bond angle in a bent molecule
105
What is the bond angle in a T-shaped molecule?
90
What is the bond angle in an octahedral molecule?
90
What is the angle of a trigonal pyramidal molecule ?
109
What are dative covalent bonds ?
When both electrons forming a covalent bond come from the same atom
In what way do molecular shapes form ?
They form in the 3D geometry that minimises repulsion between the bonded pairs
What is the order of strength in the bonded pairs repulsions
Max - lone pair to lone pair
- lone pair to bonded pair
Min - bonded pair to bonded pair
What is the angle in a square pyramid molecule ?
90
What is the equation to work out the number of electron pairs in a molecule ?
( the number of valence electrons on the central atom plus the number of bonded atoms) / 2
How do you change the no. Election pairs equation for polyatomic ions ?
(On the top line) add 1 electron for each negative charge and minus 1 electron for each positive charge.
How many electron pairs does a linear molecule have ?
2 - both bonded pairs
How many bond pairs does a trigonal planar molecule have ?
3 all bonded pairs
How many bond pairs does a tetrahedral molecule have ?
4 all bonded pairs
How many bond pairs does a trigonal bipyramidal molecule have ?
5 all bonded pairs
