Which of the following sequence regarding the first ionization potential of coinage metal is correct?
Correct answer: B. Cu <Ag <Au.
- A. Cu >Ag >Au.
- B. Cu <Ag <Au.
- C. Cu >Ag <Au.
- D. Ag >Cu <Au.
Explanation
Atomic sizes of Ag and Au are closer to each other but nuclear charge is more on Au so ionisation potential of Au is highest.(Au :889, CU:745, Ag: 731kJ mol-1 ) Therefore, option C is correct.
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About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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