Three statements about potassium and chlorine and their ions are listed.
1 The atomic radius of a potassium atom is greater than the atomic radius of a chlorine atom.
2 The first ionisation energy of potassium is greater than the first ionisation energy of chlorine.
3 The ionic radius of a potassium ion is greater than the ionic radius of a chloride ion.
Which statements are correct?
1 only
2 )
2 only
3 )
1 and 3
4 )
2 and 3
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