rlyHenny
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Ok so I'm trying to make the most of this half term to revise for my Year 12 mocks before the summer holidays, and I was wondering if someone could state the trend in ionisation energy across a period and down a group referencing to shielding, nuclear charge and atomic radius. Thank you!
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kunal123
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ionisation energy increases across the period, this is because the nuclear charge of the atom increases as well as the atomic radius decreasing means there is more attraction between the outermost electron and the nuclei hence requires more energy to remove the electron as you go across the period, whilst sheilding remains the same.

ionisation energy decreases down the group, this is because although nuclear charges increases, the atomic radius increases as well as an increase in sheilding due to there being more shells in the atom as you go down the group, hence the attraction for the outermost electron and the nuclie decreases and requires less energy to remove the outmost electron.




(Original post by rlyHenny)
Ok so I'm trying to make the most of this half term to revise for my Year 12 mocks before the summer holidays, and I was wondering if someone could state the trend in ionisation energy across a period and down a group referencing to shielding, nuclear charge and atomic radius. Thank you!
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rlyHenny
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(Original post by kunal123)
ionisation energy increases across the period, this is because the nuclear charge of the atom increases as well as the atomic radius decreasing means there is more attraction between the outermost electron and the nuclei hence requires more energy to remove the electron as you go across the period, whilst sheilding remains the same.

ionisation energy decreases down the group, this is because although nuclear charges increases, the atomic radius increases as well as an increase in sheilding due to there being more shells in the atom as you go down the group, hence the attraction for the outermost electron and the nuclie decreases and requires less energy to remove the outmost electron.
Thank you!!!
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