# L13 - Figure 8.27 Apparatus for measuring the magnetic...

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Figure 8.27 Apparatus for measuring the magnetic behavior of a sample.

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FOLLOW-UP PROBLEM 8.7 Writing Electron Configurations and Predicting  Magnetic Behavior of Transition Metal Ions PROBLEM: Write the condensed electron configuration of each transition metal ion,  and predict whether it is paramagnetic. (a)  V 3+ (Z = 23) (b)  Ni 2+ (Z = 28) (c)  La 3+ (Z = 57)
FOLLOW-UP PROBLEM 8.7 Writing Electron Configurations and Predicting  Magnetic Behavior of Transition Metal Ions PLAN: PROBLEM: Write the condensed electron configuration of each transition metal ion,  and predict whether it is paramagnetic. (a)  V 3+ (Z = 23) (b)  Ni 2+ (Z = 28) (c)  La 3+ (Z = 57) Write the electron configuration and remove electrons starting with ns to  match the charge on the ion.  If the remaining configuration has unpaired  electrons, it is paramagnetic.

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FOLLOW-UP PROBLEM 8.7 Writing Electron Configurations and Predicting  Magnetic Behavior of Transition Metal Ions PLAN: SOLUTION: PROBLEM: Write the condensed electron configuration of each transition metal ion,  and predict whether it is paramagnetic. (a)  V 3+ (Z = 23) (b)  Ni 2+ (Z = 28) (c)  La 3+ (Z = 57) Write the electron configuration and remove electrons starting with ns to  match the charge on the ion.  If the remaining configuration has unpaired  electrons, it is paramagnetic. paramagnetic        (a)  V 3+ (Z = 23)   V([Ar]4s 2 3d 3 )                     V  3+ ([Ar] 3d 2 ) + 3e -        (b)  Ni 2+ (Z = 28)   Ni([Ar]4s 2 3d 8 )              Ni 2+ ([Ar] 3d 8 )  + 2e - paramagnetic        (c)  La 3+ (Z = 80)   La([Xe]6s 2 5d 1 )                        La 3+ ([Xe])  + 3e - not paramagnetic (is diamagnetic)
A general comparison of metals and nonmetals.

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Properties of Metals:
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L13 - Figure 8.27 Apparatus for measuring the magnetic...

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