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The electron configuration of two elements with... - JAMB Chemistry 1997 Question

The electron configuration of two elements with similar chemical properties are represented by?
A
1s22s22p5 and 1s22s22p4
B
1s22s22p4 and 1s22s22p63s1
C
1s22s22p63s1 and 1s22s1
D
1s22s22p4 and 1s22s1
correct option: c
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