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Byju's Answer
Standard XII
Chemistry
Quantum Numbers
Which of the ...
Question
Which of the following is correct for 2p-orbitals?
A
n
=
1
,
l
=
2
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B
n
=
1
,
l
=
0
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C
n
=
2
,
l
=
0
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D
n
=
2
,
l
=
1
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Solution
The correct option is
B
n
=
2
,
l
=
1
Principal quantum number for 2p-orbitals (n) is 2.
Azimuthal quantum number for 2p-orbitals (l) is 1.
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Similar questions
Q.
Which of the following orbitals described by three quantum numbers will have different energies for a multielectron atom, in the absence of external electric and magnetic fields?
(1) n = 1, l = 0, m = 0
(2) n = 2, l = 1, m = -1
(3) n = 2, l = 1, m = +1
(4) n = 3, l = 2, m = +1
(5) n = 3, l = 2, m = 0
Q.
In a multi-electron atom, which of the following orbitals described by the three quantum numbers will have the same energy in the absence of magnetic and electric fields?
(A)
n
=
1
,
l
=
0
,
m
=
0
(B)
n
=
2
,
l
=
0
,
m
=
0
(C)
n
=
2
,
l
=
1
,
m
=
1
(D)
n
=
3
,
l
=
2
,
m
=
1
(E)
n
=
3
,
l
=
2
,
m
=
0
Q.
Explain giving reasons which of the following sets of quantum numbers are not possible.
(a )
n
=
0
,
l
=
0
,
m
1
=
0
,
m
s
=
+
1
/
2
(b)
n
=
1
,
l
=
0
,
m
1
=
0
,
m
s
=
−
1
/
2
(c)
n
=
1
,
l
=
1
,
m
1
=
0
,
m
s
=
+
1
/
2
(d)
n
=
2
,
l
=
1
,
m
1
=
0
,
m
s
=
−
1
/
2
(e)
n
=
2
,
l
=
3
,
m
1
=
−
3
,
m
s
=
+
1
/
2
(f)
n
=
3
,
l
=
1
,
m
1
=
0
,
m
s
=
+
1
/
2
Q.
Identify the orbital with the following quantum members-
(i) n = 1, l = 0 (ii) n = 2, l = 1, m = 0
Q.
Which electron,orbitals are designated by
(i) n= 2, l=1, m= 0;
(ii)n= 3, l= 2, m= 0;
(iii)n = 4, l = 2, m = 1 and
(iv) n = 5, I= 3, m =3 respectively ?
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