shin (ys5232) – H04: Atomic Theory 2 – Mccord – (50970)
1
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001
(part 1 oF 3) 10.0 points
What is the principal quantum number For
the orbital 5
f
?
1.
None oF these
2.
2
3.
5
correct
4.
3
5.
6
6.
4
Explanation:
n
= 5
002
(part 2 oF 3) 10.0 points
What is the orbital angular momentum quan
tum number For the orbital 5
f
?
1.
4
2.
None oF these
3.
1
4.
2
5.
3
correct
6.
0
Explanation:
ℓ
= 3
003
(part 3 oF 3) 10.0 points
How many magnetic quantum numbers does
the orbital 5
f
have?
1.
7
correct
2.
None oF these
3.
3
4.
5
5.
9
6.
1
Explanation:
m
ℓ
=

3
,

2
,

1
,
0
,
1
,
2
,
3
004
10.0 points
How many total nodal planes are present in
the complete set oF 3
d
orbitals?
1.
3
2.
5
3.
16
4.
8
correct
5.
10
6.
20
Explanation:
There are 5 orbitals in the 3
d
set.
4 oF
those orbitals are cloverleaFshaped and have
2 nodal planes each. That combines to give 8
total nodal planes For the set. The other (5th)
orbital is the
d
z
2
orbital which has 2 nodal
cones, not planes.
005
10.0 points
How many nodes are present in a 3
s
and a 3
p
orbital, respectively?
1.
2 and 2
correct
2.
0 and 2
3.
1 and 1
4.
0 and 1
5.
2 and 1
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2
Explanation:
A node is a point, a plane or a three dimen
sional region of space where the sign of the
wavefunction changes from positive to nega
tive, (or negative to positive) so it equals zero.
The lowest energy
s
orbital is 1
s
, and this has
no nodes – the wavefunction is always posi
tive. As we go to the next higher value of
n
we add a spherical node, so 2
s
would have one
node, and 3
s
two. The lowest energy
p
or
bital is 2
p
; it has one nodal plane which cuts
through the nucleus (the two ’lobes’ have op
posite signs). Again, as we go to the next
higher value of
n
we add a spherical node, so
a 3
p
orbital has two nodes.
006
10.0 points
The transition metals are elements with par
tially Flled
1.
s
subshells.
2.
f
subshells.
3.
p
subshells.
4.
d
subshells.
correct
Explanation:
In transition metals,
d
orbitals are being
Flled.
007
10.0 points
An element with 20 protons and 20 electrons
gains one electron.
The electron goes into
what type of orbital?
1.
4
s
2.
4
p
3.
3
p
4.
3
d
correct
5.
4
d
6.
3
s
Explanation:
This element has electron conFguration
[Ar] 4
s
2
. The next electron goes into the 3
d
orbital according to the Aufbau principle.
008
10.0 points
Which element is predicted to have the
groundstate
electron
conFguration
[Ar]
3
d
10
4
s
2
4
p
1
?
1.
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 Fall '07
 Fakhreddine/Lyon
 Atom, Periodic Table, Atomic orbital, Shin, n+ n+ n+

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