Question

the hydrogen like species
solve this​

Answer 1

Answer:

119

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$\huge{\bold{\boxed{\boxed{\mathbb{\purple{EXPLANATION}}}}}$

The spherically symmetric state S1 of  $Li^{2+}$  

with one radial node is 2s.

Upon absorbing light, the ion gets excited to state   $S_{2}$

which also has one radial node.

The energy of electron in $S_{2}$  is same as

that of H-atom in its ground state

$E_{n}=\frac{Z^{2} }{n^{2} }  E_{1}$

where E1 is the energy of H-atom in the ground state

$=\frac{(3^{2})E^{1}  }{n^{2} } for\:Li^{2+}$

$E_{n}=E_{1}=>n=3$

State S2 of Li2+ having one radial node is 3p.  

Orbital angular momentum quantum number of 3p is 1

$S_{1}=\frac{3^{2} }{2^{2} }  E^{1}=2.25 E^{1}\\Energy\:of\:state$

120

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121

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Answer 2

Answer:

Here is your answer dear

119...a

120....b

121.....c

Explanation: