Question

19. The atomic number of element 'X' is 7. Then the element 'X' belongs to which
period in the Modern periodic table?​

Answer 1

Answer:

The element 'X' belongs to 9th

period in the Modern periodic table.

Answer 2

Answer:

The atomic number of element 'X' is 7 = nitrogen.

Then the element nitrogen belongs to 2nd period in the modern periodic table.