Periodic Table

• Group 0

  Why does boiling point increase? (4)

  -As you go down group 0, the boiling point increases.

  -This is because the size of the atom increase.

  -Forces between the atoms increases.

  -More energy is needed to overcome the forces between the atoms.
• Describe the trend in reactivity down group 1 (1)

  increases
• Group 1

  Explain this trend (3)

  -Distance between outer electrons and nucleus increases.

  -Attraction gets weaker/ shielding increases -Outer electron is easier to lose
• Group 7

  Why does boiling point increase? (3)

  As you go down group 7:

  -The size of the molecules increases.

  -Intermolecular forces get stronger.

  -More energy need to overcome the forces between atoms.
• Describe and explain how reactivity increases as you go down group 7. (4)

  -Decrease

  -Distance between outer electron and nucleus increases.

  -Attraction gets weaker/ shielding increases.

  -Outer electron is harder to gain.
• Development of periodic table

  -Elements were placed in order of atomic weight because protons, neutrons and electrons had not been discovered.

  -Early periodic tables were incomplete and some element were placed in inappropriate groups.
• Transitions metals differences to group 1

  PHYSICAL PROPERTIES

  -Harder, denser, stronger

  -Higher melting point

  CHEMICAL PROPERTIES

  -Can form ions with different charges

  -Can form coloured charges

  -Can be used as catalysts

  -They are less reactive
• Transition metals similarities to group 1

  PHYSICAL PROPERTIES

  -Good conductors of heat and electricity

  -shiny

  CHEMICAL PROPERTIES

  -Form ionic compounds with non-metals

  -Lose electrons when they react to form positive ions
• Group 1: Chemical properties

  -Very reactive

  -Can conduct electricity
• Group 1: Physical properties

  -Soft, low density

  -Shiny (can appear dull, due to oxide layers.)