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Paramagnetism II/
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Magnetism and electron configuration
• Electrons in atoms are moving charges.
• produce magnetic field (consider as an example the electric current). Electrons act as tiny magnets.
• Magnetic field mainly produced by spin motion.
• Paired electrons have a total spin of zero, have thus no total magnetic field.
paired unpaired
II/
• diamagnetism - slightly repelled by magnetic field - no unpaired electrons
• paramagnetism - attracted to magnetic field- one or more unpaired electrons
• ferromagentism - case of paramagnetism where the substance retains its
magnetism- Very strongly attracted to magnetic field
II/
Paramagnetism
II/
• Exercise:• Which of the following species do you expect to exhibit
paramagnetism:
K Hg Ba2+ N
F- Ti2+ Cu2+
K: [Ar] 4s1
Ba: [Xe] 6s2 Ba2+: [Xe]
Cu: [Ar] 4s1 3d10 Cu2+: [Ar] 3d9
II/
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