Which one among the following elements is polyatomic ? 

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NDA-II 2024 (GAT) Official Paper (Held On: 01 Sept, 2024)
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  1. Sodium
  2. Sulphur 
  3. Chlorine 
  4. Aluminium 

Answer (Detailed Solution Below)

Option 2 : Sulphur 
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Detailed Solution

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CONCEPT:

Polyatomic Elements

  • Polyatomic elements are substances that consist of more than two atoms per molecule.
  • They can form different allotropes with varying numbers of atoms.
  • Common examples of polyatomic elements include phosphorus (P4), sulfur (S8), and ozone (O3).

EXPLANATION:

  • Among the given options:
    • Sodium(Na) is not polyatomic because it consists of four atoms per molecule.
    • Sulfur (S8) is polyatomic because it consists of eight atoms per molecule.
    • Chlorine (Cl2) is diatomic, meaning it consists of two atoms per molecule.
    • Aluminium (Al) is monatomic in its elemental form, meaning it consists of single atoms.

Therefore, the polyatomic element among the given options is sulfur.

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