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COMEDK2017Chemistryd and f Block Elements

Mercury is a liquid metal because

Options

  1. Ait has a completely filled s -orbital
  2. Bit has a small atomic size
  3. Cit has a completely filled d -orbital that prevents d-d overlapping of orbitals
  4. Dit has a completely filled d -orbital that causes d-(d) overlapping

Correct answer

A. it has a completely filled s -orbital

Step-by-step solution

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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