Match the following species with their corresponding ground state electronic configuration.

Atom/Ion Electronic configuration
A. Cu 1.  1s22s22p63s23p63d10
B. Cu2+ 2.  1s22s22p63s23p63d104s2
C. Zn2+ 3.  1s22s22p63s23p63d104s1
D. Cr3+ 4.  1s22s22p63s23p63d9
5.  1s22s22p63s23p63d3
 
A B C D
1. 4 2 5 1
2. 3 4 1 5
3. 3 2 1 4
4. 4 2 1 3
Hint: Cu (Z=29) : 1s22s22p63s23p63d104s1
The electronic configuration of the given atom or ions are as follows:
A. Cu (Z=29) : 1s22s22p63s23p63d104s1
B. Cu2+ (Z=29) : 1s22s22p63s23p63d9
C. Zn2+ (Z=30) : 1s22s22p63s23p63d10
D. Cr3+ (Z=24) : 1s22s22p63s23p63d3