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Which of the following has the smallest radius? A P B S C C l D C l − E S 2 −

Which of the following has the smallest radius?

A

P

B

S

C

Cl

D

Cl

E

S2

 

Grade:12

2 Answers

Vikas TU
14149 Points
9 months ago
Dear student 
As you go across a period, electrons are added to the same energy level.  At the same time, protons are being added to the nucleus.  The concentration of more protons in the nucleus creates a higher effective nuclear charge.  In other words, there is a stronger force of attraction pulling the electrons closer to the nucleus resulting in a smaller atomic radius.Also, Anions are larger than their respective atoms as electron-electron repulsion forces them to spread further apart. 
Hence, Cl has the smallest radius.
Vikas Amritiya
askIITians Faculty 158 Points
8 months ago
 
Dear student 
As you go across a period, electrons are added to the same energy level.  At the same time, protons are being added to the nucleus.  The concentration of more protons in the nucleus creates a higher effective nuclear charge.  In other words, there is a stronger force of attraction pulling the electrons closer to the nucleus resulting in a smaller atomic radius.Also, Anions are larger than their respective atoms as electron-electron repulsion forces them to spread further apart. 
Hence, Cl has the smallest radius.

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