exam techniques

• the dependant variable is what you measure
• independent variables are the things that change
• control variables are the ones that stay constant throughout an experiment
• group 1 reactivity increases in reactivity going down the group
• group 7 reactivity decreases in reactivity going down the group
• group 2 reactivity increases going down the group
• going down groups:

  • the nuclear charge increases
  • the shielding increases
  • there is a weaker attraction between the outershell electron and the nucleus
• degrees to kelvin = +273
• cm^3 to dm^3 = divide by 1000
• cm^3 to m^3 = divide by 1000000
• dm^3 to m^3 = divide by 1000