GEOLOGY

EARTH SCIENCE

MAGNETISM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following determines whether or not a material is magnetic?
A
the density of the material
B
the weight of the material on Earth
C
the alignment of atoms in the material
D
the number of elements that make up the material
Explanation: 

Detailed explanation-1: -The magnetic form of a substance can be determined by examining its electron configuration: if it shows unpaired electrons, then the substance is paramagnetic; if all electrons are paired, the substance is diamagnetic.

Detailed explanation-2: -The magnetic properties of a substance can be determined by examining its electron configuration: If it has unpaired electrons, then the substance is paramagnetic and if all electrons are paired, the substance is then diamagnetic.

Detailed explanation-3: -If the crystalline structure of the atoms within a piece of metal is aligned so that all of the atoms are facing the same direction, that metal will be magnetic. In most materials, the atoms are not aligned into any sort of pattern. Only ferromagnetic materials are capable of being magnetized.

Detailed explanation-4: -All magnets have north and south poles. Opposite poles are attracted to each other, while the same poles repel each other. When you rub a piece of iron along a magnet, the north-seeking poles of the atoms in the iron line up in the same direction. The force generated by the aligned atoms creates a magnetic field.

Detailed explanation-5: -A magnetic domain is a region within a magnetic material in which the magnetization is in a uniform direction. This means that the individual magnetic moments of the atoms are aligned with one another and they point in the same direction.

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