An element belongs to Group 15 and third period. Its electronic configuration will be - Sri Chaitanya Infinity Learn Best Online Courses for NCERT Solutions, CBSE, ICSE, JEE, NEET, Olympiad and Class 6 to 12

A
$(1 s)^{2} (2 s)^{2} (2 p)^{3}$
B
$(1 s)^{2} (2 s)^{2} (2 p)^{6} (3 s)^{2} (3 p)^{3}$
C
$(1 s)^{2} (2 s)^{2} (2 p)^{2}$
D
$(1 s)^{2} (2 s)^{2} (2 p)^{6} (3 s)^{2} (3 p)^{2}$

Solution:

The atomic number of element will be 2 + 8 + (15 - 10) = 15 Alternatively, the electronic configuration may be worked out from the fact that Group 15 elements contains 5 valence electrons and third shell as the valence shell.

Solution:

Related content