Answer the following questions 1. How many valence d electrons are present in Cr

Question

Answer the following questions
1. How many valence d electrons are present in Cr3+?

2. How many valence d electrons are present in Nb5+?

3. Which of the following would have the greateast difference in spin (number of unpaired electrons) between the low spin and high spin configurations

a. Octahedrally coordinated  d4 metal

b. Tetrahedrally coordinated  d5 metal

c. Tetrahedrally coordinated  d7 metal

d. Octahedrally coordinated  d8 metal

4. Match the color of a compound with the (approximate) color of light it absorbs
 

Red

Orange  

Violet
____

A. Green

B. Blue

C. Yellow

Explanation / Answer

Answer:

1. 21 valence d electrons are present in Cr3+.

2.16 valence d electrons are present in Nb5+.

3.a.Octahedrally coordinated d4 metal have the greateast difference in spin

4. the absorption of light in coloured compounds matched below approximately

red ----------- yellow

orange ----------- blue

violet ----------- greenn

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