Electronic Structures Of Ions
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1
2C h e m g u id e – a n s w e r s
ELECTRONIC STRUCTURES OF IONS
You will need a copy of the Periodic Table for these questions.
1. a) 1s
2
b) 1s
2
2s
2
2p
2
2p
2
2p
2
3s
2
3p
2
3p
2
3p
2
x
y
z
x
y
z
c) 1s
2
2s
2
2p
2
2p
2
2p
2
x
y
z
d) 1s
2
2s
2
2p
2
2p
2
2p
2
3s
2
3p
2
3p
2
3p
2
x
y
z
x
y
z
e) 1s
2
2s
2
2p
2
2p
2
2p
2
x
y
z
f) 1s
2
2s
2
2p
2
2p
2
2p
2
x
y
z
2
2
2
2
2
g) 1s
2s
2p
2p
2p
x
y
z
h) 1s
2
2s
2
2p
2
2p
2
2p
2
3s
2
3p
2
3p
2
3p
2
x
y
z
x
y
z
i) 1s
2
2s
2
2p
2
2p
2
2p
2
x
y
z
j) 1s
2
2s
2
2p
2
2p
2
2p
2
x
y
z
2. a) [Ar] 3d
3
b) [Ar] 3d
7
c) [Ar] 3d
5
d) [Ar] 3d
8
e) [Ar] 3d
9
3. a) 4s
2
4p
2
4p
2
4p
2
x
y
z
b) 6s
2
c) 5s
2
5p
2
5p
2
5p
2
x
y
z
d) 4s
2
4p
2
4p
2
4p
2
x
y
z
2
2
2
2
10
e) 4s
4p
4p
4p
4d
(I know it is inconsistent not showing all the d-orbitals separately, if we are
x
y
z
going to show the separate p-orbitals – but that's what tends to happen. In fact, in these examples,
we would normally lump all the p-electrons together as, for example, 4p
6
, but I am just trying to
make you work as hard as possible!)
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