NTA Abhyas JEE Main2020ChemistryClassification of Elements and Periodicity in PropertiesPractice
Which of the following has smallest radius?
Options
- A1 s 2 , 2 s 2 2 p 6 , 3 s 2
- B1 s 2 , 2 s 2 2 p 6 , 3 s 2 3 p 1
- C1 s 2 , 2 s 2 2 p 6 , 3 s 2 3 p 5
- D1 s 2 , 2 s 2 2 p 6 , 3 s 2 3 p 3
Correct answer
C. 1 s 2 , 2 s 2 2 p 6 , 3 s 2 3 p 5
Step-by-step solution
All the elements are of the same periods because all have the equal number of shell. In a period, the size of atom decreases as we from left to right,.i.e., from A to B to D to C. Hence, element corresponding to C is smallest in the size.