Classification Of Elements And Periodicity In Properties Ques 43
43. The electronic configuration of an element is
$1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{3}$. What is the atomic number of the element, which is just below the above element in the periodic table?
[1995]
(a) 33
(b) 34
(c) 36
(d) 49
Show Answer
Answer:
Correct Answer: 43.(a)
Solution:
(a) Atomic number of the given element is 15 and it belongs to 5th group. Therefore atomic number of the element below the above element $=15+18=33$.
BETA
