what is the predicted order of first ionization energies from highest to lowest for lithium (li), sodium…
what is the predicted order of first ionization energies from highest to lowest for lithium (li), sodium (na), potassium (k), and rubidium (rb)?\no rb > k > na > li\no k > rb > na > li\no li > na > k > rb\no rb > k > li > na
Answer
Brief Explanations:
First - ionization energy decreases down a group in the periodic table. Lithium (Li), sodium (Na), potassium (K), and rubidium (Rb) are in Group 1. As we move down the group from Li to Rb, the atomic radius increases, and the outermost electron is farther from the nucleus and less tightly held, so the first - ionization energy decreases.
Answer:
Li > Na > K > Rb