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The atomic numbers of the metallic and non-metallic elements which are liquid at room temperature respectively are:
  • a)
    55, 87
  • b)
    33, 87
  • c)
    35, 80
  • d)
    80, 35
Correct answer is option 'D'. Can you explain this answer?
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The atomic numbers of the metallic and non-metallic elements which are...
Bromine (symbol Br and atomic number 35) and mercury (symbol Hg and atomic number 80) are both liquids at room temperature. Bromine is a reddish-brown liquid, with a melting point of 265.9 K. Mercury is a toxic shiny silvery metal, with a melting point of 234.32 K.
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The atomic numbers of the metallic and non-metallic elements which are...
The metallic and non-metallic elements which are liquid at room temperature respectively are mercury (Hg) and bromine (Br).

Mercury has an atomic number of 80, making option D the correct answer.

Explanation:
- Metallic elements are located on the left side of the periodic table, while non-metallic elements are located on the right side.
- Mercury (Hg) is the only metallic element that is liquid at room temperature (25°C or 77°F). It is located in group 12 of the periodic table, and has an atomic number of 80.
- Bromine (Br) is the only non-metallic element that is liquid at room temperature. It is located in group 17 of the periodic table, and has an atomic number of 35.
- Therefore, the correct answer is D: 80 for the metallic element (mercury) and 35 for the non-metallic element (bromine).
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The atomic numbers of the metallic and non-metallic elements which are...
D ... mercury and bromine
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The atomic numbers of the metallic and non-metallic elements which are liquid at room temperature respectively are:a)55, 87b)33, 87c)35, 80d)80, 35Correct answer is option 'D'. Can you explain this answer?
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