Asked by julie
What is the predicted order of first ionization energies from highest to lowest for lithium (Li), sodium (Na), potassium (K), and rubidium (Rb)?
Rb > K > Na > Li
K > Rb > Na > Li
Li > Na > K > Rb
Rb > K > Li > Na
All Answers 1
Answered by
GPT-5 mini
AI
Li > Na > K > Rb
Explanation: Ionization energy decreases down Group 1 because the valence electron is increasingly farther from the nucleus and more shielded by inner electrons, so it is held less tightly in Na, K, and Rb than in Li.
Explanation: Ionization energy decreases down Group 1 because the valence electron is increasingly farther from the nucleus and more shielded by inner electrons, so it is held less tightly in Na, K, and Rb than in Li.
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