Inorganic - AQA A level Chemistry

• What are metalloids?


  Combination of metallic and non-metallic properties
• Why do groups have similar properties?


  same electron configuration in their out most level
• What happens to reactivity down the S block?


  increases
• What happens to reactivity going down non-metals?


  decreases
• What is the reactivity of transition metals like?


  unreactive - useful metals
• Describe the trends in melting points across period 3

  
• Describe the trends in atomic radius across period 3

  
• Describe the trends in 1st ionisation energy across period 3

  
• Why does ionization energy decrease down a group?


  shielding increases as you go down the group, and the distance of the outer electron to the nucleus increases therefore there is less of an attraction to the outer electron
• What are sodium, magnesium and aluminum?


  metallic, therefore shiny and conduct electricity
• What is silicon?


  metalloid - conducts electricity to some extent
• what are phosphorus, sulfur and chlorine?


  non-metals which do not conduct electricity and have low MP and BP
• what is argon?


  a noble gas
• What period 3 elements react with water?


  Magnesium and sodium
• What is the equation for sodium + water?

  
• What is the equation for magnesium + water and magnesium + water vapour?

  
• What type of reaction is period 3 elements + oxygen?


  Exothermic
• What is the equation for Sodium + oxygen?

  
• What is the equation for magnesium + oxygen?

  
• What is the equation for aluminium + oxygen?

  
• What is the equation for silicon + oxygen?

  
• What is the equation for phosphorus + oxygen?

  
• What is the equation for sulfur + oxygen?

  
• What structure do sodium oxide, magnesium oxide and potassium oxide all have?


  Giant ionic lattices however aluminium oxide shows some covalent characteristics
• What structure is silicon dioxide?


  Giant covalent
• What structure do phosphorus oxide and sulfur oxides have?


  They exist as simple molecular compounds
• What period 3 oxides are insoluble in water?


  Aluminium oxide and silicon oxide
• What does amphoteric mean?


  Will react with acids and bases
• If phosphorus oxide reacts with water what does it form?

  
• If sulfur dioxide reacts with water what does it form?

  
• What forms when sodium oxide reacts with sulfuric acid?

  Sodium Sulfate and water
• What forms when magnesium oxide reacts with hydrochloric acid?


  Magnesium chloride and water
• What forms when aluminium oxide reacts with hydrochloric acid?


  Aluminium chloride and watwr
• What period 3 oxide is amphoteric?


  Aluminium oxide
• What forms when Aluminium Oxide reacts with sodium hydroxide?


  NaAl(OH)4
• What is formed when silicon dioxide reacts with NaOH?


  Na2SiO3 and water
• What is formed when phosphorus oxide reacts with NaOH?

  
• What is formed when sulfur dioxide reacts with NaOH?


  NaHSO3
• Acidity and Alkalinity of period 3 oxides

  
• Describe the trends in atomic radius of group 2 metals


  the atomic radius increases as you go down the group due to shielding and the s-orbital becoming further away from the nucleus going down the group