What is the electronic configuration of an element represented as 19 9 X?
CHEMISTRY
WAEC 1999
What is the electronic configuration of an element represented as199X?
- A. 1s22s22p5
- B. 1s22s23s23p3
- C. 1s22s22p333s2
- D. 1s22s22p63s23p64s1
Correct Answer: A. 1s22s22p5
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