Which statement is correct?
1 )
The first ionisation energy of chlorine is more than the first ionisation energy of argon.
2 )
The second ionisation energy of calcium is more than the second ionisation energy of magnesium.
3 )
The second ionisation energy of sulfur is equal to the first ionisation energy of phosphorus.
The eighth ionisation energy of chlorine is more than the first ionisation energy of neon.
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