Applications Magnetic and Electric Fields

In many spectroscopic applications external magnetic or electric fields are applied to a molecular sample. For magnetic fields, the perturbing influence of the field is known as the Zeeman effect. Electric fields give rise to the Stark effect. As we have seen, uniform magnetic and electric fields have symmetries Cook and C ov, respectively. In this case, the symmetry group of the experiment will be constrained to these operations, which leave the molecule -I- field combination invariant. It 

1 The multiplication table of a set of elements is given below. Does this set form a group  

2 Use molecular ball and stick models to construct examples of molecules that have a reflection plane as the only symmetry element. Similarly, for a center of 

Why is the order of a rotational axis of a polyhedral object always an integer Prove that a halving subgroup is always a normal subgroup. 

Determine the point group of a soccer ball, a tennis ball, a basketball, and a trefoil knot. 

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