Explanation

The binding energy per nucleon is highest for intermediate-sized nuclei (e.g., iron).

Both lighter and heavier nuclei have lower binding energies per nucleon compared to these intermediate nuclei.

Explanation

Explanation

 The proper term for "X" is Plane of symmetry.

A plane of symmetry is an imaginary plane that divides a crystal into two halves, where each half is the mirror image of the other. 

Explanation

Explanation

Explanation

Paramagnetic compounds are attracted by a magnetic field.

Due to the presence of unpaired electrons.

Explanation

Explanation

Explanation

Explanation

σ to σ* transition requires the highest energy.

Because it involves the breaking of a strong sigma bond.