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In isoelectronic species Cl^(-),Ar,Ca^(2...

In isoelectronic species `Cl^(-),Ar,Ca^(2+)` size differ due to

A

Nuclear charge

B

Principal quantum number of valence shell

C

Azimuthal quantum number of valence shell

D

Electron-electron interaction in the outer orbitals

Text Solution

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The correct Answer is:
A
For iso-electronic species size is governed by proton to electron ratio i.e. `(p/e^-)` ratio More the value of `(P/e^(-))` ratio, smaller will be its size as more number of proton will have an ability to hold electrons more strongly resulting in decrement in ionic size Hence, size is affected by nuclear charge i.e. no. of proton.
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