Select the options below that are correct for diamagnetism and paramagnetism.
A) Most elements and some compounds are paramagnetic.
B) Individual magnetic moments in paramagnetic substances cancel each other.
C) Diamagnetism is observed as repulsion in a magnetic field.
D)Diamagnetic properties are due to the presence of some unpaired electrons.
E) Most compounds and some elements are diamagnetic.
F) Diamagnetism is observable in substances with a symmetric electronic structure.
I think C and E deserve consideration.
It counts it wrong with only C and E.
Its all but B and D
To answer this question, we need to understand the concepts of diamagnetism and paramagnetism.
Diamagnetism refers to the property of a substance that causes it to be weakly repelled by a magnetic field. It occurs in all materials to some degree, but it is typically very weak and often overshadowed by other magnetic properties. Diamagnetism is present in all substances and does not depend on the presence of unpaired electrons.
On the other hand, paramagnetism refers to the property of a substance that causes it to be weakly attracted to a magnetic field. It occurs in certain substances that have unpaired electrons, which create magnetic moments that align with the applied magnetic field. Paramagnetism is usually stronger than diamagnetism.
Now, let's analyze the given options:
A) "Most elements and some compounds are paramagnetic." - This statement is correct. Paramagnetism is observed in most elements and some compounds that have unpaired electrons.
B) "Individual magnetic moments in paramagnetic substances cancel each other." - This statement is incorrect. In paramagnetic substances, individual magnetic moments do not cancel each other out. Instead, they align with the applied magnetic field, resulting in a net attraction.
C) "Diamagnetism is observed as repulsion in a magnetic field." - This statement is correct. Diamagnetic substances are repelled by a magnetic field, exhibiting a weak repulsion.
D) "Diamagnetic properties are due to the presence of some unpaired electrons." - This statement is incorrect. Diamagnetic properties do not depend on the presence of unpaired electrons. All materials exhibit diamagnetism to some extent, regardless of their electron configuration.
E) "Most compounds and some elements are diamagnetic." - This statement is correct. Diamagnetism is observable in most compounds and some elements, as mentioned earlier.
F) "Diamagnetism is observable in substances with a symmetric electronic structure." - This statement is correct. Diamagnetic substances often have a symmetric electronic structure, which leads to the cancellation of magnetic moments within the material.
Therefore, the correct options are A), C), E), and F).