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Study the Radius of the Element Given Below and Answer the Following Questions. - Science and Technology 1

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Short Note

Study the radius of the element given below and answer the following questions.

elements K Na Rb Cs Li
Atomic radius (pm) 231 186 244 262 151

a) Which of the above elements have the smallest atom?
b) In which group of the modern periodic table the above element are belongs?
c) What is the periodic trend observed in the variation of atomic radii down a group?

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Solution

a) Li 
b) first group 
c) while going down a group atomic radius goes on increasing. As a result, atomic size increases. 

Concept: Periodic Properties - Periodic Properties: Atomic Radius Or Atomic Size
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