group 1

• How does the reactivity of group one metals change?

  It increases as we move down the group
• What explains the change in reactivity of group one metals?

  The outer electron configuration of the metals
• What is the name of group one in the periodic table?

  Alkali metals
• How many electrons do all group one metals have in their outer energy level?

  One electron
• What happens when lithium reacts with oxygen?

  It forms lithium oxide
• How does sodium's reaction with oxygen compare to lithium's?

  Sodium reacts more rapidly than lithium
• What compound is formed when potassium reacts with oxygen?

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

  Potassium reacts more rapidly than both
• What happens to lithium's outer electron when it reacts with oxygen?

  It moves to the oxygen atom
• What charge does a lithium ion have after reacting with oxygen?

  Positive one charge
• What charge does an oxide ion have after lithium reacts with oxygen?

  Negative two charge
• What is the general reaction pattern for group one metals with oxygen?

  They all react similarly with oxygen
• What happens when lithium reacts with chlorine?

  It forms lithium chloride
• What ions are produced when lithium reacts with chlorine?

  One positive lithium ion and one negative chloride ion
• What can be inferred about the reactivity of group one metals with chlorine?

  They react rapidly with chlorine
• What is observed when lithium reacts with water?

  Effervescence and purple solution
• What does the universal indicator turning purple indicate during the reaction?

  An alkaline solution is formed
• What gas is produced when lithium reacts with water?

  Hydrogen
• How does sodium's reactivity with water compare to lithium's?

  Sodium reacts more rapidly than lithium
• What is observed when potassium reacts with water?

  Extremely rapid reaction and gas production
• What is produced in the reaction between lithium and water?

  Lithium hydroxide and hydrogen
• Why do group one metals become more reactive as we move down the group?

  They lose their outer electron more easily
• What two reasons explain the increased reactivity of group one metals down the group?

  Increased atomic radius and shielding effect
• How does atomic radius affect the reactivity of group one metals?

  Greater distance reduces attraction to nucleus
• What is the shielding effect in relation to group one metals?

  Electrons in inner levels repel outer electron
• What happens to the outer electron as we move down group one?

  It becomes easier to lose
• What is the overall trend in reactivity for group one metals?

  Reactivity increases down the group
• What are the two main factors that increase reactivity in group one metals?

  1. Increased atomic radius
  2. Increased shielding effect