Shapes Of Molecules And Ions Flashcards
(22 cards)
What is the bond angle in a trigonal planar molecular shape?
120°
Example: boron trifluoride (BF3)
What is the explanation for the trigonal planar shape?
Three bonding pairs of electrons repel each other as far apart as possible to minimise repulsions.
What is the bond angle in a tetrahedral molecular shape?
109.5°
Example: methane (CH4)
What is the explanation for the tetrahedral shape?
Four bonding pairs of electrons repel each other as far apart as possible to minimise repulsions.
What is the bond angle in a linear molecular shape?
180°
Example: carbon dioxide (CO2)
What is the explanation for the linear shape?
Two sets of bonding pairs of electrons repel each other as far apart as possible to minimise repulsions.
What is the bond angle in a trigonal bipyramidal shape?
90 and 120
What is the explanation for the trigonal bipyramidal shape
Five bonding pairs of electrons repel each other as far apart as possible to minimise repulsions.
What is the bond angle in an octahedral shape?
90
What is the explanation for the octahedral shape?
Six bonding pairs of electrons repel each other as far apart as possible to minimise repulsions
What is the bond able in a pyramidal shape?
107
What is the explanation for the pyramidal shape
Three bonding pairs of electrons and one lone pair of electrons repel each other as far apart as possible to minimise repulsions.
Lone pairs repel more than bonding pairs
True or false: Bonding pairs repel more than lone pairs.
False
What is the bond able in a bent shape?
104.5
What is the explanation for the bent shape?
Two bonding pairs of electrons and two lone pairs of electrons repel each other as far apart as possible to minimise repulsions.
Lone pairs repel more than bonding pairs
True or false: Coordinate bonds repel the same as normal bonding pairs of electrons
True
What are the bond angles in a T shaped molecule. (2 lone pairs and 3 bonding pairs)
90 and 180
What is the explanation for the T shaped molecule
Three bonding pairs of electrons and two lone pairs of electrons repel each other as far apart as possible to minimise repulsions.
Lone pairs repel more than bonding pairs
What are the bond angles in a linear molecule which has 2 bonding pairs and 3 lone pairs
180
What is the explanation for a linear molecule? (With 2 bonding pairs and 3 lone pairs)
Two bonding pairs of electrons and 3 lone pairs of electrons repel each other as far apart as possible to minimise repulsions.
Lone pairs repel more than bonding pairs
What is the bond angle in a square planar shape?
90
What is the explanation of a square planar shape?
Four bonding pairs of electrons and two lone pairs of electrons repel each other as far apart as possible to minimise repulsions.
Lone pairs repel more than bonding pairs.
