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Question

Element with atomic number 15 and mass number 31 is present in
  1. group 5 and period 3
  2. group 15 and period 3
  3. group 5 and period 4
  4. group 15 and period 4


Solution

The correct option is B group 15 and period 3
Z = 15 common group number = V A
IUPAC group no. = Group 15

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