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Test Index
JEE Main Chemistry Class 11 Classification of Elements and Periodicity in Properties 1 Questions
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Question : 34
Total: 100
The ionic radii of
F
−
and
O
2
−
respectively are
1.33
Å
and
1.4
Å
, while the covalent radius of
N
is
0.74
Å
The correct statement for the ionic radius of
N
3
−
from the following is :
[25 Jul 2021 Shift 2]
It is smaller than
F
−
and
N
It is bigger than
O
2
−
and
F
−
It is bigger than
F
−
and
N
, but smaller than of
O
2
−
It is smaller than
O
2
−
and
F
−
, but bigger than of
N
Validate
Solution:
F
−
,
O
2
−
and
N
3
−
all are isoelectronic species in which
N
3
−
have least number of protons due to which it's size increases as least nuclear attraction is experienced by the outer shell electrons.
Size order
N
3
−
>
O
2
−
>
F
−
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