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.
Elements P, Q, R, S have 6, 11, 15, 17 electrons respectively, therefore, ...
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Consider the following reaction equation: SO42-(aq) + 2H+(aq) + ye- → SO42-(aq) + H2O(1). ...