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CBSE Class 11-science Answered

Which of the two is bigger in size and why? Cl or Cl- 
Asked by ajanmcr | 21 Nov, 2015, 07:00: AM
answered-by-expert Expert Answer

If we look at the neutral chlorine atom, it has 17 electrons whereas the chloride ion has 18 electrons.

 

Cl: [Ne] 3s2 3p5

     

Cl-: [Ne] 3s2 3p6

 

The negative chloride ion is significantly larger than the chlorine atom since the nucleus cannot hold the 18 electrons as tightly as the 17 electrons in the neutral atom.

Answered by Vaibhav Chavan | 22 Nov, 2015, 06:25: PM
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