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Grade: 12th pass
        
What is the order of their ionic radius of O-2, F-, Na+, and Mg+2, and Ne atom 
one year ago

Answers : (6)

Arun
22539 Points
							
 The more + the charge, the smaller the ionic radius. Remember that - means adding electrons. These electrons go in the outermost shells. Also, when an atom loses electrons, it clings ever more tightly to the ones it has left, further reducing the ionic radius. 

Mg2+ Na+ F- O2- N3-
one year ago
Arun
22539 Points
							
 The more + the charge, the smaller the ionic radius. Remember that - means adding electrons. These electrons go in the outermost shells. Also, when an atom loses electrons, it clings ever more tightly to the ones it has left, further reducing the ionic radius. 

Mg2+ Na+ F- O2- N3-
 
one year ago
Sahil pote
15 Points
							
For isoelectronic species ionic size is directly proportional to (charge on anion)/(charge on cation) or simply calculate e/z ratio and that will give you the answer as
Mg2+
You can also think this logically as electron is added the new electron is repelled by the existing electrons and the size increases. Similarly when an electron is removed the nucleus attracts the remaining electron with greater force and the size decreases.
Hope that helps you.
one year ago
anish
15 Points
							
correct order in ionic radius
Mg2+ Na+ F- O-2 N-3
BUT IONIC RADIUS DIRETUIY PRIPOSNEL IS NEGTIVE CHARGE
 
one year ago
Neha
42 Points
							
Mg+2,Na+,F-,O-2,N-3 are isoelectronic species having 10 electrons
On moving N-3 to mg +2  positive charge increase 
More the positive charge smaller the ionic radius
So order of ionic radius is 
             Mg+2
Hope it helps
one year ago
vaibhav gaur
11 Points
							
1+ charge means losing an electron which automatically reduces the size of the element and in 1- charge it means gaining an electron which increases the size of the element.                                          hence the order in increasing ionic radii is                                                                                               Mg+2,Na+,F-,O-2,N-3
 
one year ago
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