What is the atomic number of the element gallium?

This question was previously asked in
RPF SI (2018) Official Paper (Held On: 19 Dec, 2018 Shift 1)
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  1. 31
  2. 34
  3. 44
  4. 45

Answer (Detailed Solution Below)

Option 1 : 31
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Detailed Solution

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The correct answer is 31

Key Points

  • Gallium is a chemical element with the symbol Ga and atomic number 31.
  • It is a soft, silvery metal at standard temperature and pressure; however, it becomes a liquid at slightly above room temperature.
  • Gallium is primarily used in electronics, semiconductors, and as a component in low-melting alloys.
  • It is not found in free form in nature but is extracted from bauxite and zinc ores.

Additional Information

  • Gallium was discovered by French chemist Paul-Émile Lecoq de Boisbaudran in 1875.
  • Its name is derived from the Latin word "Gallia," meaning France.
  • Gallium is used in various high-temperature thermometers and barometers due to its low melting point.
  • It has a unique property of being able to "wet" glass or porcelain, making it useful in various scientific applications.
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