Which among the following elements behaves like alkali metals as well as halogens in its properties?

This question was previously asked in
SSC GD Constable (2022) Official Paper (Held On : 01 Feb 2023 Shift 3)
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  1. Neon
  2. Helium
  3. Hydrogen
  4. Lithium

Answer (Detailed Solution Below)

Option 3 : Hydrogen
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Detailed Solution

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The correct answer is Hydrogen.

Key Points

  •  Hydrogen behaves like alkali metals as it has one electron in its outermost shell, which it readily loses to form a cation.
  • Hydrogen also behaves like halogens as it can share its electrons with other elements to form a covalent bond.
  • This property of hydrogen is due to its position in the periodic table, where it is placed above the alkali metals and halogens.
  •  Helium and neon are noble gases and do not exhibit properties of either alkali metals or halogens.
  • Lithium behaves like an alkali metal, but not like a halogen.

Additional Information

  •  Neon is a noble gas and does not readily react with other elements to form compounds.
  •  Helium is the second lightest element and is used in balloons, airships, and cooling systems.
  • Lithium is a soft, silvery-white metal that is highly reactive and is used in batteries, ceramics, and pharmaceuticals.
  • Modern Periodic table showing Groups and Periods:
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