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  • Define atomic size. Give its unit of measurement. In the modern periodic table what trend is observed in the atomic radius in a group and a period and why is it so ?      </

Define atomic size. Give its unit of measurement. In the modern periodic table what trend is observed in the atomic radius in a group and a period and why is it so ?

 

 

 

 
 
 
 
 

Answers (1)

Atomic size is the distance between the centre of the nucleus and the outermost shell of an isolated atom.

Unit-  Picometer /pm

• Trends in Atomic radius

In a group: increases down the group ; due to addition of a new shell .

In a period: atomic radius decreases from left to right ; due to increase in pulling power of nucleus / due to addition of electrons in the same shell

 

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Safeer PP

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