Classification of Elements and Periodicity in Properties - Result Question 6

####6. The electronic configuration of an element is

1s22s22p63s23p3. 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:

  1. (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.


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