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Chemistry
The ionisation enthalpy of second period elements vary with atomic number as <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/chemistry/6a201e3facf7c63685d9a9d540e8b685-.png /> The elements present at points B and E are
Q. The ionisation enthalpy of second period elements vary with atomic number as
The elements present at points
B
and
E
are
1513
202
Classification of Elements and Periodicity in Properties
Report Error
A
B
e
,
C
13%
B
B
,
N
14%
C
B
e
,
O
21%
D
B
e
,
N
52%
Solution:
The electronic configuration of
B
e
=
1
s
2
,
2
s
2
(fully filled).
The electronic configuration of
N
=
1
s
2
,
2
s
2
,
2
p
3
(half filled).
Due to stable electronic configuration of
B
e
and
N
the
I
E
of these elements is more than elements of the next group.
