The electronic configuration of an elements is 1s22s22p63...
The electronic configuration of an elements is 1s22s22p63s23p3. How many unpaired electrons are there in the element?
5
4
3
2
Correct answer is C
The atomic number of phosphorus is 15 and the 3p sublevel has three unpaired electrons.
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Which of the following ions is acidic? ...
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