1.Define ionisation energy
2.whar are units of ionisation energy
3.what happens to ionisation energy in groups and period
4.what do you mean by 1st and 2nd ionisation energy
5.why it is not possible to remove electrons from 18th group elements
6.which element has highest ionisation and lowest ionisation energies
7.
2.whar are units of ionisation energy
3.what happens to ionisation energy in groups and period
4.what do you mean by 1st and 2nd ionisation energy
5.why it is not possible to remove electrons from 18th group elements
6.which element has highest ionisation and lowest ionisation energies
7.
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