C2

• Give the name for Group 1

  alkali metals
• Give the name for Group 7

  Halogens
• Give the name for Group 0

  noble gases
• What are the seven diatomic elements?

  H2, N2, O2, F2, Cl2, Br2, I2
• What happens to reactivity of group 1 down the group and why?

  Increases down the group because the outer electron is further from the nucleus and less attracted to the nucleus so it is easier for the outer electron to be lost
• What happens to reactivity of group 7 down the group and why?

  Decreases because the outer shell is further from the nucleus and less attracted to the nucleus so it is harder to gain an electron
• What is produced when a group 1 metal reacts with water?

  Metal hydroxide and hydrogen gas
• Describe three observations of the reaction of lithium with water

  Fizzing, metal moves on surface, universal indicator turns blue
• Describe three observations of the reaction with sodium with water

  Fizzing, metal melts into a ball and moves on the surface, universal indicator turns blue
• Describe three observations of the reaction with potassium with water

  Fizzing, metals moves on surface, lilac flame, universal indicator turns blue
• What is a displacement reaction?

  When a more reactive element takes the place of a less reactive element in a compound
• What happens to boiling point of group 7 down the group?

  Increases due to larger molecules having stronger intermolecular forces between them
• State seven differences between transition metals and Group 1 elements

  Transition metals form ions with different charges, form coloured compounds, can be used as catalysts, are harder, stronger, less reactive and have higher melting points.
• What do metals do when they react?

  Lose electrons to form positive ions
• What do non-metals do when they react?

  Gain electrons to form negative ions
• What happens to boiling point of group 0 down the group and why?

  Increases due to larger atoms having stronger forces between them
• How are the elements arranged in the modern periodic table?

  In order of atomic number
• How were the elements arranged in the early periodic table?

  In order of atomic weight
• State three things Mendeleev did to develop the Periodic Table

  Left gaps for undiscovered elements, correctly predicted the properties of the undiscovered elements, swapped the order of atomic weights in some cases so that elements were in the right group
• How were elements placed in groups in the early Periodic Table?

  Elements with similar chemical properties were placed in the same group
• State two observations when Lithium reacts with Chlorine or Oxygen

  Crimson flame, white solid forms
• State two observations when Sodium reacts with Chlorine or Oxygen

  Yellow flame, white solid forms
• State two observations when Potassium reacts with Chlorine or Oxygen

  Lilac flame, white solid forms