SHAPES OF ORBITALS
LECTURE 03
QUANTUM NUMBERS (Q.N.)
X
Y
Z
1s
X
Y
Z
2px
Z
Y
X
2py
2pz
Z
Y
X
X
Y
Z
3dxz
3dxy
Z
Y
X
3dyz
Z
Y
X
3dx
2
y
2
Z
Y
X
X
Y
Z
3dz
2
F
i
g
u
r
e
: Shapes and Orientations of s, p and d orbitals.
s
 orbitals:
Spherically symmetrical
p
 orbitals:
Dumbbell shaped consisting of
two lobes
d
 orbitals:
complex geometrical
shapes as compared to
p
orbitals
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View Full DocumentThe quantum numbers of an electron that gives information about its size and shape of energy
level, orientation and spin around the nucleus are
(1)
Principal Quantum Number, n
: The main shell (or level) to which the electron
belongs (size). This number has a dependence only on the distance between the
electron and the nucleus. The average distance increases with
n
, and hence quantum
states with different principal quantum numbers are said to belong to different shells.
(2)
Azimuthal (subsidiary) Quantum Number, l
: The subshell which governs the
angular momentum of the electron (shape). In chemistry, this quantum number is very
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 Spring '11
 dr.sohrabuddin
 Atomic orbital, Principal quantum number

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