shapes Flashcards
1
Q
what’s electron pair repulsion theory
A
electrons are negatively charged so therefore repel eachother. The e- pairs surrounding an atom decide its shape
2
Q
what’s the template for shape questions
A
electron pairs repel. this compound or atom has this many bonding or lone pairs. Lone pairs repel eacheother more than they repel bonding pairs which repel themselfs even less. The molecule adopts this shape and bond angle to reduce repulsion
3
Q
4 banded pairs
A
tetrahedral 109.5
4
Q
3 bonded 1 lone
A
pyramidal 107
5
Q
2 bonded to lone
A
non linea 104.5
6
Q
2 banded or 2 lone
A
linear 180
7
Q
3 bonded or lone
A
trigonal planar 120
8
Q
6 bonded or lone
A
octahedral 90
9
Q
A
