Identify the element that does NOT belong to Period 6 of the Modern Periodic Table.

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SSC CGL 2023 Tier-I Official Paper (Held On: 24 Jul 2023 Shift 3)
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  1. Silicon
  2. Tungsten
  3. Rhenium
  4. Platinum

Answer (Detailed Solution Below)

Option 1 : Silicon
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Detailed Solution

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The correct answer is Silicon. Key Points

  • Period 6 of the Modern Periodic Table consists of elements from atomic number 55 (cesium) to atomic number 86 (radon).
  • Silicon belongs to Period 3 of the Periodic Table and is not part of Period 6.
  • Tungsten (atomic number 74), Rhenium (atomic number 75), and Platinum (atomic number 78) all belong to Period 6 of the Periodic Table.
  • Tungsten is a transition metal that is commonly used in the manufacture of electrical contacts, filaments, and X-ray tubes.
  • Rhenium is a rare and expensive metal that is used in high-temperature superalloys, as well as in the manufacture of electrical contacts and filaments.
  • Platinum is a precious metal that is used in jewelry, as well as in the manufacture of catalytic converters, electrical contacts, and laboratory equipment.

Additional Information

  • One type of chemical element is silicon.
  • Its atomic number is 14 and its symbol is Si.
  • It has a blue-grey metallic sheen and is a hard, brittle crystalline solid.
  • It is a semiconductor and tetravalent metalloid.
  • It belongs to the periodic table's group 14.
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