The electronic configuration of an element having atomic number 17 is:
1s22s22p63s23p44s1
1s22s22p63s23p5
1s22s22p63s23p24s24p1
1s22s22p63s23p2x3pz
A
1s22s22p63s23p5
B
1s22s22p63s23p44s1
C
1s22s22p63s23p2x3pz
D
1s22s22p63s23p24s24p1
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Solution
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If the atomic number is 17, there must be 17 protons and 17 electrons. Starting from the lowest level, we add electrons to each higher level until we have reached 17 electrons.
The electronic configuration is 1s22s22p63s23p5
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