Has higher first ionization enthalpy…….. Na : k Cl : Ar Zr : Ti Be : B
Answers
Explanation:
search-icon-image
Class 11
>>Chemistry
>>Classification of Elements and Periodicity in Properties
>>Trends in Physical Properties
>>The correct order of ioniza...
Question
Bookmark
The correct order of ionization energies is:
Medium
Solution
verified
Verified by Toppr
Correct option is
C
Au>Cu>Ag
On moving down in a group, valence shell becomes far away from the nucleus and thus nucleus attraction towards test electron decreases which results in a decrease in ionization energy. So, the correct order should be Cu>Ag>Au
However, in actual practice, the ionization energy for Au is higher than that of Cu and Ag. This is due to weak shielding effect of 4f electrons present in Au.
Thus, a net result of effective nuclear charge and shielding effect favors for predominating trend of effective nuclear charge and therefore the correct order of ionization energies will be Au>Cu>Ag.
Hence, the correct option is C.