JEE Mains · Chemistry · STD 11 - 3. Classification of elements and periodicity in properties
The correct trend in the first ionization enthalpies of the elements in the \(3^{rd}\) period of periodic table is:
- A \(Al < Si < S < P < Cl\)
- B \(Al < S < P < Si < Cl\)
- C \(Si < S < Al < P < Cl\)
- D \(S < Si < Al < P < Cl\)
Answer & Solution
Correct Answer
(A) \(Al < Si < S < P < Cl\)
Step-by-step Solution
Detailed explanation
In general on moving from left to right in a period ionization energy increases as \(Z_{eff}\) increases. (Ionisation energy of phosphorus is more because of half filled stable configuration)
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