VSEPR (EXCLUSIVE) Flashcards
What does VSEPR stand for?
V:alence
S:hell
E:lectron
P:air
R:epulsion
How to tell if atom is a lone pair?
Shares electrons and has extra electrons
How to tell if atom is bonding pair?
Wants to gain electrons
What are the 6 shapes ya learn for the molecules?
(after 2, then it starts going up by 1)
- Linear
- Bent
- Trigonal planar
- Tetrahedral
- Trigonal bipyramidal
- Octahedral
How to tell if there’s a bend in the shape of the molecule?
Based on repulsion strength
Based on n° of lone/bonding pairs
Which has the strongest repulsion strength?
LP:LP
Which has the weakest repulsion strength?
BP:BP
Which has the balanced repulsion strength?
(or something)
LP:BP
What are the 2 shapes bonded with 2 other molecules?
(give me the degrees for the other)
- Linear (straight)
- Bent (104.5° apart)
What’s the shape connected to 3 other molecules?
(give me degrees)
- Trigonal planar (120° apart)
What’s the shape connected to 4 other molecules?
(give me the degrees)
- Tetrahedral (109.5° apart)
What’s the shape connected to 5 other molecules?
- Trigonal bipyramidal
What’s the shape connected to 6 other molecules?
- Octahedral
How to even answer the VSEPR question anyways?
- Gain electrons of each element
- Draw the covalent bond
- State what pairs are seen
- State the shape and why (for the degrees one thats the LP included)
Additionally, if u needa compare, compare their shapes and pairs ig?
Remember that bond angle changes based on LP being present and if that pair has a lot of electrons
(press space for examples)
Preciate it :D
NH3 = 3 Bps & 1 Lp
Causes trigonal pyramidal , 109 degrees on one of em
H2O = 2 Bps & 1 Lp
Well ye ofc it’s bent uhhh idk where i was going with this but the top one is important okay?
