s-Block ElementsHard
Question
Sodium has, as compared to potassium :
Options
A.less electronegativity
B.more ionisation potential
C.larger atomic radius
D.lower melting point
Solution
For (A), (C) and (D) refer above question.
(D) Sodium is smaller than potassium in size. The valence shell electron is tightly bound with nucleus and therefore, more energy is required to eject out the electron. So sodium has higher ionisation energy than that of potassium.
(D) Sodium is smaller than potassium in size. The valence shell electron is tightly bound with nucleus and therefore, more energy is required to eject out the electron. So sodium has higher ionisation energy than that of potassium.
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