Group 2 and 7
- Created by: LauraNannini
- Created on: 19-04-20 10:11
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- Topic 4
- Group 2
- Physical properties
- Atomic radius increases going down
- Ionic radius increases going down
- Melting points decrease going down
- Chemical properties
- Reactivity increases going down
- ionisation energy decreases going down
- Reaction with oxygen
- Increasing vigour down the group
- oxygen is reduced and the metal is oxidized
- Reaction with water
- Increase vigour going down the group
- Magnesium can only react with water if it is steam
- Metal hydroxide + hydrogen gas
- Reaction with Dilute acid
- Increase vigour going down
- A salt + hydrogen gas formed
- Group 2 oxides
- With water to make metal hydroxide
- Charge density decreases
- Increase in solubility
- Group 2 Carbonate
- Insoluble in water
- Thermal decompose to make metal oxide and carbon dioxide
- Group 2 sulphates
- White crystaline solid
- Solubility in water decreases going down
- Physical properties
- Group 7
- Physical properties
- Boiling points increase going down
- Electronegativity decreases going down
- Atomic size increases going down
- Ionic size increases going down
- Oxidising power decreases going down
- Reducing power increases going down
- Halogens and water
- Acid + halogen oxide
- Halogen + sodium hydroxide
- Sodium halogen + sodium halogen oxide + water
- Test for halides
- Add silver nitrate
- Chloride = white
- Bromide = cream
- Iodide = yellow
- Add dilute ammonia
- Chloride is soluble by iodide and bromide are not
- Add strong ammonia
- Chloride and Bromide is soluble but iodide isn't
- Add silver nitrate
- Halogen with hydrogen
- Boiling point decreases going down
- Reducing ability increases going down
- Physical properties
- Group 2
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