C4.1 Predicting chemical reactions

• What are the Group 1 elements known as?

  Alkali metals
• How does the density of Group 1 elements change?

  The density increases down the group
• What trend in reactivity is observed in Group 1 elements?

  Reactivity increases down the group
• What are the Group 7 elements known as?

  Halogens
• How does the boiling point trend in Group 7 elements behave?

  The boiling point increases down the group
• What is a halogen displacement reaction?

  A reaction where a more reactive halogen displaces a less reactive halogen from its compound
• What is the characteristic of noble gases in terms of reactivity?

  Noble gases are unreactive
• Why are noble gases considered unreactive?

  They have a full outer electron shell
• What are transition metals known for?

  They are good conductors of electricity and are malleable
• What is a key property of transition metals?

  They can act as catalysts
• How do the densities of transition metals compare to Group 1 metals?

  Transition metals generally have higher densities than Group 1 metals
• What happens when metals react with water?

  They produce hydrogen gas and a metal hydroxide
• What is a metal displacement reaction?

  A reaction where a more reactive metal displaces a less reactive metal from its compound
• What does the rate of reaction indicate in metal reactions?

  It indicates the reactivity of the metals involved
• Why can't copper displace silver from silver nitrate solution?

  Copper is less reactive than silver
• What is the significance of the periodic table in predicting reactions?

  The periodic table helps predict the reactivity and properties of elements
• What are the key trends in the reactivity of Group 1 and Group 7 elements?

  • Group 1 (alkali metals): Reactivity increases down the group.
  • Group 7 (halogens): Reactivity decreases down the group.
• What are the physical and chemical properties of noble gases?

  • Noble gases are colorless, odorless, and tasteless.
  • They have low boiling and melting points.
  • They are unreactive due to a full outer electron shell.
• What are the properties of transition metals compared to alkali metals?

  • Transition metals are harder and denser.
  • They have higher melting points.
  • They are good conductors of electricity.
  • They can act as catalysts.
• How can you predict the products of a displacement reaction?

  1. Identify the more reactive element.
  2. Determine which element will be displaced.
  3. Write the balanced equation for the reaction.