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How to learn the element charges for GCSE
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Hi, how should i effectively learn the charges of the elements that don’t fit the pattern for GCSE chemsitry as I’ve got my mocks in a few weeks
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Group 1 metals = +1 charge,
Group 2 metals = +2 charge,
Zinc = +2 charge (or Iron is quite commonly used at GCSE, assume any transition metal is +2 is a safe assumption).
Aluminium = +3 charge,
Nitrogen = -3 charge
Oxygen / Sulphur = -2 charge
Group 7 (halogens) = -1 charge.
Ammonium ion NH4+ = +1 charge
NO3 Nitrate (V) - = -1 charge,
SO4 2- / CO3 2- Carbonate (V) / Sulphate (VI) = -2 charge
Look at their group on the periodic table and will the atoms lose or gain electrons, and how many?
Group 2 metals = +2 charge,
Zinc = +2 charge (or Iron is quite commonly used at GCSE, assume any transition metal is +2 is a safe assumption).
Aluminium = +3 charge,
Nitrogen = -3 charge
Oxygen / Sulphur = -2 charge
Group 7 (halogens) = -1 charge.
Ammonium ion NH4+ = +1 charge
NO3 Nitrate (V) - = -1 charge,
SO4 2- / CO3 2- Carbonate (V) / Sulphate (VI) = -2 charge
Look at their group on the periodic table and will the atoms lose or gain electrons, and how many?
Last edited by Ðeggs; 1 year ago
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You could always seperate them into positive and negative ions and maybe make little flashcard (like the small size) and test yourself little and often before your mock.
The only important thing is that when iron is metioned in the question, it will either be written as Iron (II) meaning it would be Fe+2 or Iron (III) which would be Fe+3
Hope you do well in your mocks
The only important thing is that when iron is metioned in the question, it will either be written as Iron (II) meaning it would be Fe+2 or Iron (III) which would be Fe+3
Hope you do well in your mocks
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(Original post by DamnBro)
You could always seperate them into positive and negative ions and maybe make little flashcard (like the small size) and test yourself little and often before your mock.
The only important thing is that when iron is metioned in the question, it will either be written as Iron (II) meaning it would be Fe+2 or Iron (III) which would be Fe+3
Hope you do well in your mocks
You could always seperate them into positive and negative ions and maybe make little flashcard (like the small size) and test yourself little and often before your mock.
The only important thing is that when iron is metioned in the question, it will either be written as Iron (II) meaning it would be Fe+2 or Iron (III) which would be Fe+3
Hope you do well in your mocks
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