Question

The total number of symmetry element present in a group is called

as *

a. order of a group

b. class of a group

4. mass of a group

c. type of a group​

Answer 1

Answer:

order of a group

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Answer 2

Answer:

Option a) Order of a group

Explanation:

A symmetry element is a geometrical entity, whereas an operation performed on a symmetry element is known as a symmetry operation.

When we operate a symmetry operation on a molecule, then after that symmetry operation the molecule appears the same as before as it was in the starting state.

If a molecule does not contain any symmetry elements, then it is called an asymmetric molecule, and such a molecule will be chiral.

But a plane of symmetry or point of symmetry involves a reflection operation, then the presence of such a symmetry element makes a molecule dissymmetric and achiral.

The symmetry operations of a molecule always form a group.

The total number of symmetry elements found is referred to as an order of a group.

RESULT:

Hence, choice a) order of a group, is the correct answer.