A proton has spin and magnetic moment just like an electron. Why then its effect is neglected in magnetism of materials?

A proton has spin and magnetic moments just like as electron. Why then its effect is neglected in magnetism of materials?

Correct order of spin only magnetic moment is

What is meant by spin magnetic moment?

The spin only magnetic moment of Mn^(4+) is nearly

The spin only magnetic moment value of Fe^(+2) is

An ion of definite magnetic moment (spin only) is -