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Chemistry
Identify the elements X and Y using the ionisation energy values given below: <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/chemistry/3839590d714a6eccd3522ca3346deb08-.png />
Q. Identify the elements
X
and
Y
using the ionisation energy values given below:
1583
207
JEE Main
JEE Main 2021
Classification of Elements and Periodicity in Properties
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A
X
=
N
a
;
Y
=
M
g
80%
B
X
=
M
g
;
Y
=
F
6%
C
X
=
M
g
;
Y
=
N
a
10%
D
X
=
F
;
Y
=
M
g
4%
Solution:
N
a
→
[
N
e
]
3
s
1
I
E
1
is very low but
I
E
2
is very high due to stable noble gas configuration of
N
a
+
M
g
→
[
N
e
]
3
s
2
I
E
1
&
I
E
2
→
Low
I
E
3
is very high.