Shape of Molecules Flashcards

1
Q

Electron pair repulsion theory

A

Shape is determined by electron pairs in outer shell. Covalent bond is a pair of electrons

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2
Q

Linear structure

A

2 electron pairs around central atom.
Bond angle - 180

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3
Q

trigonal planar structure

A

central atom with 3 pair bonding atoms around it (no lone pairs)
Bond Angle - 120

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4
Q

Tetrahedral Molecule

A

Central atom with 4 bonding pairs
Bond angle - 109.5

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5
Q

Trigonal Bipyramidal

A

Central atom with 5 bonding pairs
Bond angle - 120 and 90

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6
Q

Octahedral

A

6 bonding pairs
Bonding pairs - 90

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7
Q

Difference between lone pairs and bonding pairs

A

Lone pairs repel more strongly than bonding pairs.
Extra repulsion decreses bond angle by 2.5

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8
Q

Non liner / v shape / Bent

A

2 bonding pairs. 2 lone pairs
Bond angle - 104.5

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9
Q

Square planar

A

4 bonding pairs. 2 lone pair.
Bond angle - 90

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