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Chemistry
Mercury is a liquid metal because
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Q. Mercury is a liquid metal because
KCET
KCET 2008
The d-and f-Block Elements
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, $[Xe] 4\int^{10}, 5d^{10}, 6s^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.