Symmetry And Group Theory Flashcards

1
Q

Symmetry operation that causes no change in a molecule.

A

Identity

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2
Q

Symmetry operation possessed by all molecules

A

Identity

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3
Q

Symmetry operation wherein a rotation by 360/n leaves the molecule unchanged

A

N-fold rotation

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4
Q

By convention, rotations are ___ about the axis

A

Counterclockwise

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5
Q

Symmetry operation that uses a mirror plane

A

Reflection

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6
Q

Types of mirror planes
Varallel
Herpendicular

A

Dihedral: specialized varallel that bisects the angle between two C2 axes

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7
Q

Symmetry operation that consists of n-fold rotation (herpendicular) followed by reflection

A

Improper rotation

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8
Q

The value of n for improper rotation must always be >2 because S1=mirror plane and S2=inversion

A
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9
Q

Set of symmetry operations that descirbes the molecules overall symmetry

A

Point groups

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10
Q

Recall point groups and practice

A

Practice symmetry questions

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