Which of the following are metalloids? 

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SSC CGL 2023 Tier-I Official Paper (Held On: 18 Jul 2023 Shift 2)
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  1. Boron, oxygen, aluminium 
  2. Boron, mercury, iron  
  3. Boron, silicon, antimony 
  4. Aluminium, mercury, copper 

Answer (Detailed Solution Below)

Option 3 : Boron, silicon, antimony 
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Detailed Solution

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The correct answer is Boron, silicon, antimony.

 Key Points

  • Metalloids:-
    • These are elements that have properties similar to both metals and non-metals. In some of their properties, they show similarity with metals and in others with non-metals.
    • They are hence placed in between metals and non-metals.
    • Metalloids can also be called semimetals.
    • They are found in groups 13, 14, 15, 16 and 17 of the p-block.
    • Metalloids include Boron, Silicon, Germanium, Arsenic, Antimony, Tellurium and Polonium.
    • Total elements are 118 out of which 91 are metals, 7 are metalloids, and 20 are non-metals.
    • In the modern periodic table, metalloids are in Right of the periodic table

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