Which of the following correctly describes the relationship between the first ionization energy () and the second ionization energy () of Copper () compared to Potassium ()?

Question

Which of the following correctly describes the relationship between the first ionization energy ($IE_1$) and the second ionization energy ($IE_2$) of Copper ($Cu$) compared to Potassium ($K$)?

Prashant Kotian · Accepted Answer

Correct answer: B. due to higher . However, because removing the second electron from requires breaking a highly stable noble gas core (), whereas only has a pseudo-noble gas core ().

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