Classification of Elements and Periodicity in Properties - Result Question 6
####6. 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?
(a) 33
(c) 36
(b) 34
(d) 49
[1995]
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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 $=15+18=33$.
