KCET · Chemistry · d and f Block Elements
Mercury is a liquid metal because
- A it has a completely filled orbital
- B it has a small atomic size
- C it has a completely filled orbital that prevents - overlapping of orbitals
- D it has a completely filled orbital that causes - overlapping
Answer & Solution
Correct Answer
(C) it has a completely filled orbital that prevents - overlapping of orbitals
Step-by-step Solution
Detailed explanation
The electronic configuration of mercury (80) is, [Xe] \(4 \mathrm{f}^{10}, 5 \mathrm{~d}^{10}, 6 \mathrm{~s}^{2}\). Its -subshell is completely filled, thus it prevents the overlapping of orbitals ( - overlapping). Hence, it is liquid metal at room temperature.
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