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Tardigrade
Question
Chemistry
From the following energy levels of hydrogen atom, the values of E∞ and E3 in J are, respectively E∞= ldots ldots ldots E3= ldots ldots ldots E2=-0.545 × 10-18 J E1=-2.18 × 10-18 J
Q. From the following energy levels of hydrogen atom, the values of
E
∞
and
E
3
in
J
are, respectively
____
E
∞
=
………
____
E
3
=
………
____
E
2
=
−
0.545
×
1
0
−
18
J
____
E
1
=
−
2.18
×
1
0
−
18
J
1517
228
TS EAMCET 2019
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A
1
,
−
0.242
×
1
0
−
18
B
∞
,
−
0.726
×
1
0
−
18
C
0
,
−
0.242
×
1
0
−
18
D
0
,
−
0.321
×
1
0
−
18
Solution:
E
n
=
−
2.18
×
1
0
−
18
⋅
n
2
Z
2
where,
E
n
=
energy of an electron in
n
th orbital.
Z
=
atomic number
n
=
number of orbital
For hydrogen,
Z
=
1
Therefore,
E
3
=
−
2.18
×
1
0
−
18
×
3
2
1
=
−
9
2.18
×
1
0
−
18
=
−
0.242
×
1
0
−
18
and
E
∞
=
−
2.18
×
1
0
−
18
×
∞
1
E
∞
=
0
Hence,
E
∞
=
0
and
E
3
=
−
0.242
×
1
0
−
18
J