group 1 CGP edexcel igcse

• What are Group 1 elements known as?

  Alkali metals
• How do Group 1 elements react with water?


  They react vigorously to produce hydroxides
• What happens when lithium, sodium, and potassium react with water?

  • They react vigorously
  • Produce metal hydroxide solution
  • Release hydrogen gas (fizzing)
• What is the word equation for sodium reacting with water?

  sodium + water → sodium hydroxide + hydrogen
• What do Group 1 metals form when they react with oxygen?

  Metal oxides
• How does reactivity change as you go down Group 1?

  Elements become more reactive down the group
• How can you observe the reactivity of Group 1 elements with water?

  By measuring the time taken to react
• Which Group 1 element is the least reactive?

  Lithium
• Which Group 1 element is the most reactive?

  Potassium
• How does potassium's reaction with oxygen compare to sodium and lithium?

  Potassium reacts quicker with oxygen
• How can you predict the reactivity of other Group 1 metals?

  By using the trend in reactivity
• What happens to the outermost electron as you go down Group 1?

  It is more easily lost
• Why does the attraction between the outermost electron and the nucleus decrease down Group 1?

  The outermost electron is in a further shell
• How does the size of atoms change down Group 1?

  Atoms get bigger down the group
• What is the relationship between atomic size and reactivity in Group 1 metals?

  Bigger atoms are more reactive
• how does the reactivity of elements in group 1 change as you go along it?

  the elements in group 1 get more reactive as you go down the group
• how many outer electrons do group 1 elements have?

  1
• what does it mean if the outermost electron gets farther away form the nucleus?

  the attraction between the outermost electron and nucleus becomes less, increasing reactivity