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Tardigrade
Question
Chemistry
Mercury is a liquid metal because
Q. Mercury is a liquid metal because
3125
232
KCET
KCET 2008
The d-and f-Block Elements
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A
it has a completely filled s-orbital
17%
B
it has a small atomic size
8%
C
it has a completely filled
d
-orbital that prevents
d
−
d
overlapping of orbitals
53%
D
it has a completely filled
d
-orbital that causes
d
−
d
overlapping
22%
Solution:
The electronic configuration of mercury
(
80
)
is,
[
X
e
]
4
∫
10
,
5
d
10
,
6
s
2
. Its d-subshell is completely filled, thus it prevents the overlapping of
d
orbitals (
d
−
d
overlapping). Hence, it is liquid metal at room temperature.