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BSc Nursing GNM 2020 Solved Paper
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© examsiri.com
Question :
90 of 200
Marks:
+1
,
-0
Which of the following ions has smallest ionic radius?
M
g
2
+
N
a
+
F
O
2
−
Validate
Solution:
Each one of these ions contains 10 electrons and hence all are isoelectronic ions but their nuclear charges increase in the order.
O
2
−
(
+
8
)
,
F
−
(
+
9
)
,
N
a
+
(
+
11
)
,
M
g
2
+
(
+
12
)
∴
Their ionic radii decrease in the order:
O
2
−
>
F
−
>
N
a
+
>
M
g
2
+
© examsiri.com
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