Which has smallest size. Al3- Mg2- N3-
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Answer:
12
MgMg
2+
13
Alal
3+
No. of e
_
12 10 13 10
No. of P
+
12 12 13 13
as we move from left to right in a period ionic radii
decrease due to increase in effective nuclear charge
Al>Mg
and also higher is the cationic charge smaller is the ionic radii due to the increase in effective nuclear charge
Hence, Al
3+
<Mg
2+
<Al<Mg
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