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TS EAMCET 6-Aug-2021 Shift 2 Question Paper
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© examsnet.com
Question : 122
Total: 160
The energy (in eV) associated with the electron in the
1
st
orbit of
Li
2
+
is
−
122.4
−
61.15
−
30.5
−
244.6
Validate
Solution:
Energy of an electron in hydrogen like species in
n
th shell is given by
E
=
−
13.6
Z
2
n
2
e
V
where,
Z
=
atomic number
n
=
number of shell
For electron in first orbit of
L
i
2
+
E
1
=
−
13.6
×
3
2
1
2
e
V
=
−
122.4
e
V
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