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Question: Answered & Verified by Expert
Mercury is a liquid metal because
Chemistryd and f Block ElementsCOMEDKCOMEDK 2017
Options:
  • A it has a completely filled $s$-orbital
  • B it has a small atomic size
  • C it has a completely filled $d$-orbital that prevents $d-d$ overlapping of orbitals
  • D it has a completely filled $d$-orbital that causes d-(d) overlapping
Solution:
2359 Upvotes Verified Answer
The correct answer is: it has a completely filled $s$-orbital
Mercury is a liquid metal because it has completely filled $6 s$-orbital. The inner $f$-orbital poorly screens nuclear charge that stabilise $6 s$-orbital. Thus, it is not possible to form any bond with other elements.

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