The electronic configuration of an element(X) is 1s22s22p63s23p3 . What is the atomic number of the element which is just below ‘X’ in the modern periodic table
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a
33
b
34
c
31
d
49
answer is A.
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Detailed Solution
Given element is Phosporus atomic number Z = 15Element below ‘P’ in that group = 15 + 18 = 33.