Chemical Properites of Transition Metals

• What are the transition elements classified as?

  Metals
• What are the physical properties of transition elements?

  They have high melting points and densities, and are strong and hard.
• What unique characteristic do transition elements have regarding their compounds?

  They form coloured compounds.
• What role do transition elements play in chemical reactions?

  They act as catalysts.
• What are the differences in chemical properties between group 1 elements and transition elements?

  • Group 1 elements react quickly with oxygen at room temperature.
  • Most transition elements react slowly or not at all with oxygen at room temperature.
  • Group 1 elements react vigorously with cold water.
  • Most transition elements react slowly or not at all with cold water.
• What happens when copper reacts with oxygen?

  Copper forms copper oxide.
• How do group 1 elements react with halogens?

  They react vigorously with halogens.
• What is the reaction between iron and chlorine?

  Iron forms iron(III) chloride.
• What ions can manganese form?

  Manganese forms Mn²⁺ and Mn³⁺ ions.
• What ions can copper form?

  Copper forms Cu⁺ and Cu²⁺ ions.
• What are the colors of some iron compounds?

  • Iron(II) hydroxide, Fe(OH)₂: Pale green
  • Iron(III) hydroxide, Fe(OH)₃: Orange-brown
  • Iron(III) oxide, Fe₂O₃: Red-brown
• What color do transition elements typically form in their compounds?

  They form coloured compounds.
• What is the role of catalysts in chemical reactions?

  Catalysts increase the rate of reaction without being used up.
• What is an example of a catalyst used in the Haber process?

  Iron
• What does manganese(IV) oxide do in chemical reactions?

  It increases the decomposition of hydrogen peroxide to oxygen and water.