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KCET2008Chemistryd and f Block Elements

Mercury is a liquid metal because

Options

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

Correct answer

C. it has a completely filled orbital that prevents - overlapping of orbitals

Step-by-step solution

The electronic configuration of mercury (80) is, [Xe] 4 f ¹⁰, 5 ~d ¹⁰, 6 ~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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