Shapes Of Molecules Flashcards
(14 cards)
pairs of electrons do what
repel each other until they are as far apar as possible in a 3D space
what does a wedge mean when drawing bonds
its coming out towards us
what does a broken line indicate
its going below the paper away from us
name the shape with 4 pairs of electrons., what is the bond angle
tetrahedral
109.5
name the shape with 3 pairs of electrons
trigonal planar
name the shape with 5 pairs of electrons, what are it bond angles
trigonal bipyramid
120 and 90
name the shape with 6 pairs of electrons
what is its bond angle
octahedral
90
what are lone pairs of electrons
electrons in the outer shell that arent involved in bonding
lone pairs of electrons do what to bonding pairs
repel the bonding pairs of electrons
if a molecule contains a lone pair what will happen
bonding pairs squeezed closer together by 2.5 degrees
what is a pyramidal shape made of
3 bonding pairs and one lone pair
what is an example of a molecule with a pyramidal structure
ammonia
what is a v shaped molecule made of
2 bonded pairs and 2 lone pairs
name the rules for working out shapes
1- group number of central atom
2- coordination number- attached atoms
3-charge
4- add all 3 numbers and divide by 2 because everything is a pair
5- compare electron pairs and check for lone pairs
