Which element is a transition metal in Group 9 of the periodic table?

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SSC JE Civil 07 Jun 2024 Shift 1 Official Paper - 1
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  1. Cobalt (Co)
  2. Copper (Cu)
  3. Nickel (Ni)
  4. Iron (Fe)

Answer (Detailed Solution Below)

Option 1 : Cobalt (Co)
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Detailed Solution

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The correct answer is Cobalt (Co).

Key Points

  • Cobalt (Co) is a transition metal located in Group 9 of the periodic table.
  • It has the atomic number 27.
  • Transition metals are characterized by their ability to form variable oxidation states and to form colored compounds.
  • Cobalt is primarily used in the production of alloys and batteries.
  • It is a key component in lithium-ion batteries, which are widely used in portable electronic devices and electric vehicles.
  • Cobalt compounds are also used in catalysts and pigments.

 Additional Information

  • Copper (Cu)
    • Copper is a transition metal but is located in Group 11 of the periodic table.
    • It has the atomic number 29.
    • Copper is widely used in electrical wiring and plumbing.
  • Nickel (Ni)
    • Nickel is a transition metal situated in Group 10 of the periodic table.
    • It has the atomic number 28.
    • Nickel is commonly used in stainless steel and other corrosion-resistant alloys.
  • Iron (Fe)
    • Iron is a transition metal located in Group 8 of the periodic table.
    • It has the atomic number 26.
    • Iron is a major component of steel, which is used in construction and manufacturing.
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