momin (rrm497) – Homework 2 – Sutcliffe – (53120)
1
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001
10.0 points
Ψ
2
(
x,y,z
) is related to
1.
the Laplacian transform of the Bohr equa
tion.
2.
the probability of finding an electron at
the point (
x,y,z
) in space with the origin (0)
at the nucleus.
correct
3.
Bohr magnetons.
4.
the probability of a
p
orbital becoming an
s
orbital.
5.
the
nocturnal
emissions
of
mercury
lamps.
Explanation:
Ψ
2
gives the probability of finding an elec
tron in a particular infinitesimally small vol
ume of space in an atom.
002
10.0 points
In a onedimensional particle in a box, for Ψ
4
,
how many nodes are predicted?
1.
3
correct
2.
1
3.
4
4.
0
5.
2
Explanation:
003
10.0 points
What is the subshell notation and the number
of orbitals that can have the quantum num
bers
n
= 1
, ℓ
= 0?
1.
1
p
; 5
2.
1
p
; 1
3.
1
s
; 1
correct
4.
None of these
5.
1
s
; 2
6.
1
p
; 2
Explanation:
The notation is
n
ℓ
where
n
= 1
,
2
,
3
,
4
,
5
,
· · ·
ℓ
= 0
,
1
,
2
,
· · ·
,
(
n

1) represented by a letter:
ℓ
value
0
1
2
3
4
5
letter
s
p
d
f
g
h
m
ℓ
=

ℓ,

(
ℓ

1)
,

(
ℓ

2)
,
· · ·
,
0
,
· · ·
+(
ℓ

2)
,
+(
ℓ

1)
,
+
ℓ
and
m
s
=
±
1
2
.
To find the number of orbitals that can have
the stated values of
n
and
ℓ
(and any allowed
values of
m
ℓ
and
m
s
), use
ℓ
to find the number
of different values of
m
ℓ
.
To find the maximum number of electrons
that can have the stated values of
n
and
ℓ
(and any allowed value of
m
ℓ
and
m
s
), double
the number of different values of
m
ℓ
.
004
10.0 points
The
n
and
ℓ
quantum numbers of the last
electron of an element are
n
= 4 and
ℓ
= 2
.
The element is
1.
a representative element.
2.
a
d
transition metal.
correct
3.
a nonmetal.
4.
an
f
transition metal.
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momin (rrm497) – Homework 2 – Sutcliffe – (53120)
2
5.
a noble gas.
Explanation:
Where
ℓ
= 2,
d
electrons are filling. These
are the transition metals.
005
10.0 points
How many
d
electrons does I (atomic number
53) possess?
1.
20
correct
2.
10
3.
16
4.
53
5.
0
6.
8
7.
5
Explanation:
I has 10 electrons in the 3
d
orbital and 10
electrons in the 4
d
orbital to give a total of 20
d
electrons.
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 Spring '07
 Fakhreddine/Lyon
 Chemistry, Electron, Periodic Table

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