Shape / Bond angles Flashcards
What does the shape of molecules depend on?
No. of electrons in outer shell of central atom.
No. of these electrons which are in BONDED or LONE pairs.
What does the Electron Pair Repulsion Theory state?
That electron pairs will take up positions as far away from each other as possible, to minimise the repulsive forces between them.
Which experience the most repulsion?
LP-LP
LP-BP
BP-BP
LP-LP = STRONGEST
LP-BP = middle
BP-BP = WEAKEST
What is the shape and bond angle in a shape with 2 bonded pairs and 0 lone pairs?
Linear
180°
What is the shape and bond angle in a shape with 3 bonded pairs and 0 lone pairs?
Trigonal Planar
120°
What is the shape and bond angle in a shape with 4 bonded pairs and 0 lone pairs?
Tetrahedral
109.5°
What is the shape and bond angle in a shape with 5 bonded pairs and 0 lone pairs?
Trigonal Bipyramid
90° and 120°
Tri = 3
Bi = 2
3+2 = 5
What is the shape and bond angle in a shape with 6 bonded pairs and 0 lone pairs?
Octahedral
90°
What is the shape and bond angle in a shape with 2 bonded pairs and 1 lone pair?
Bent
104.5°
What is the shape and bond angle in a shape with 3 bonded pairs and 1 lone pair?
Trigonal Pyramidal
107°
What is the shape and bond angle in a shape with 4 bonded pairs and 1 lone pair?
Seesaw
120° and 90°
What is the shape and bond angle in a shape with 2 bonded pairs and 2 lone pairs?
Bent
104.5°
What is the shape and bond angle in a shape with 2 bonded pairs and 3 lone pairs?
T-Shaped
88°
What is the shape and bond angle in a shape with 4 bonded pairs and 2 lone pairs?
Square Planar
90°
What is the shape and bond angle in a shape with 3 bonded pairs and 2 lone pairs?
Linear
180°
