Shapes

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What is the bond angle and name of a shape with 2 groups of electrons?
180degrees. Linear
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What is the bond angle and name of a shape with 3 groups of electrons?
120degrees. Planar triangular
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What is the bond angle and name of a shape with 4 groups of electrons? (4 bonding pairs)
109degrees. Tetrahedral
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What is the bond angle and name of a shape with 4 groups of electrons? (3 bonding pairs and 1 lone pair)
109degrees. Pyramidal
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What is the bond angle and name of a shape with 4 groups of electrons? (2 bonding pairs and 2 lone pairs)
109degrees. Bent
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What is the bond angle and name of a shape with 5 groups of electrons?
120degrees & 90degrees. Trigonal bipyramidal
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What is the bond angle and name of a shape with 6 groups of electrons?
90degrees. Octahedral
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What theory determines the shape of a molecule?
The electron pair repulsion theory.
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What is the electron pair repulsion theory ie what does it state?
The theory states that electron groups repel one another and thus position themselves to be as far apart in space as possible.
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Describe the 3 lines used to demonstrate shapes of molecules?
1. dotted line - represents bonds facing away from you 2. full line - represents bonds in the plane of the paper 3. wedge line - represents bonds facing towards you
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What does the shape of a molecule depend upon?
The number of groups of electrons.
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What can be a group of electrons?
A single bond, a double bond, a triple bond, or a lone pair of electrons.
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Card 2

Front

What is the bond angle and name of a shape with 3 groups of electrons?

Back

120degrees. Planar triangular

Card 3

Front

What is the bond angle and name of a shape with 4 groups of electrons? (4 bonding pairs)

Back

Preview of the front of card 3

Card 4

Front

What is the bond angle and name of a shape with 4 groups of electrons? (3 bonding pairs and 1 lone pair)

Back

Preview of the front of card 4

Card 5

Front

What is the bond angle and name of a shape with 4 groups of electrons? (2 bonding pairs and 2 lone pairs)

Back

Preview of the front of card 5
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