Q.

Atomic number of nitrogen is 7. The atomic number of the third member in the same family is

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a

23

b

15

c

33

d

51

answer is C.

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Detailed Solution

Z=7.......2nd periodZ=7+8...3rd periodZ=7+8+18...4th periodThus Z=33 is the third member of 15th group
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Atomic number of nitrogen is 7. The atomic number of the third member in the same family is