The electronic configuration of an element is
1s 2s 2p 3s 3p3. The atomic number and the group
number of the element "X" which is just below the above
element in the periodic table are respectively
(a) 23 and 5 (b) 23 and 15.() 33 and 15 (d) 33 and 5.
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the element below the given element is arsenic with atomic number 33 and group number 15. so correct answer is c
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