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Download Magnetism and electron configuration
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Transcript
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 F- Hg Ba2+ Ti2+ Cu2+ N K: [Ar] 4s1 Ba: [Xe] 6s2 Ba2+: [Xe] Cu: [Ar] 4s1 3d10 Cu2+: [Ar] 3d9 II/
