A-LEVEL

• ion - charged particles which is formed by loss or gain of electrons
• Oxygen is NEGATIVE DELTA
• 
  

  Hydrogen is POSITIVE DELTA
• Alcohols can dissolve in water because of the hydrogen bonding with water molecules and alcohol functional group
• Volumetric flask
• Systemic name means work out and write down the oxidation number
• Calculating empirical formula from percentage

  • Change all the percentages to grams
  • Calculate the number of moles of each element in the compound (mass ÷ Mr)
  • Find empirical formula by dividing the number of moles of each element by the lowest number of moles
• ammonia is alkali
• Activation energy - E a
• Sulfur is solid
• Iodine is solid
• Bromine is liquid