1. Tardigrade
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  4. The substance in which the magnetic moment of a single atom is not zero, is called as:

Q. The substance in which the magnetic moment of a single atom is not zero, is called as:

 1526  180 Bihar CECEBihar CECE 2002Magnetism and Matter Report Error

Solution:

Non-zero magnetic moment implies a partially filled electron shell. Paramagnetism requires that the atoms individually have permanent dipole moment even without an applied field, which typically implies a partially filled electron shell. While in ferromagnetic material the magnetic moments of the atoms on different substances oppose as in antiferromagnetism but the opposing moments are unequal and a spontaneous magnetization remains. Diamagnetism is the result of changes in the orbital motion of electrons due to the application of an externally applied magnetic field. While ferromagnetism is one of the strongest forms of magnetism. It exhibits no magnetic moment in the absence of an external magnetic field.