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Chemistry > Shapes Of Mol/ Ions > Flashcards

Shapes Of Mol/ Ions Flashcards

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1
Q

What is a bonding pair?

A

Pair of e shared between 2 atoms

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2
Q

What is a lone pair?

A

Pair of unshared e in outer shell of an atom

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3
Q

State the lp-bp strengths

A

Lp-Lp> Lp-Bp> Bp-Bp

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4
Q

Why is BeCl2 linear?

A

2 bps of e repel each other equally and mol take up this shape to minimise repulsions

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5
Q

Why is BF3 trigonal planar?

A

3 bps of e repel each other equally and mol takes up its shape to min repulsions

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6
Q

What shape is BeCl2?

A

Linear

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7
Q

What shape is BF3?

A

Trigonal Planar

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8
Q

What shape is CH4?

A

Tetrahedral

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9
Q

Why is CH4 tetrahedral?

A

4bps e repel each other equally and molecule takes up this shape to min repulsions

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10
Q

What shape is CO2?

A

Linear

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11
Q

What shape is PF5?

A

Trigonal Bipyramid

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12
Q

Why is PF5 trig bipyr?

A

5 bps of e repel each other equally and mol takes up this shape to min repulsions

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13
Q

What shape is SF6?

A

Octahedral

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14
Q

Why is SF6 octrahedral?

A

Six bp e repel each other equally and mol takes up this shape to min repulsions

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15
Q

What is the bond angle and shape of NH3?

A

107 degrees and Pyramidal

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16
Q

Why is NH3 pyramidal?

A

3 bps and 1 lp- lp > rep than bp and mol takes up this shape to minimise repulsions

17
Q

What is the shape and bond angle of H20?

A

104.5 degrees and Bent

18
Q

Why is water a bent shape?

A

2bp e and 2 lp, lp> rep bp and mol takes up this shape to min repulsions

19
Q

What is the shape and bond angle of NH4?

A

Tetrahedral and 109.5 degress

20
Q

Why is NH4 a tetrahedral shape?

A

4 bps e repel each other and equally and ion takes up this shape to minimise repulsions

21
Q

What shape is ClF3?

A

T-shaped and 86 degrees

22
Q

Why is BF3 T shaped?

A

3 bps and 2 lps- lp>repulsion than bp- mol takes up shape to min repulsions

Chemistry (9 decks)

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