What is the predicted order of first ionization energies from highest to lowest for lithium (Li), sodium (Na), potassium (K), and rubidium (Rb)?

A. X Rb > K> Na > Li

B. K> Rb > Na > Li

C. Li > Na > K> Rb

D. Rb>K> Li > Na

The correct answer is C on edg 2020

Idon't see the pic?

Answerspecies;

It's called the falling actionwrong subject by the way

Radon-222 or rn-222 has a half-life of 3.82 days. to determine the fraction of an original sample of rn-222 that remains unchanged after 7.646 days, we calculate the amount of rn-222 remaining after 7.646 days and divide it with the original amount. using 1 gram as a basis and using half-life calculation methods, we can determine that  0.249 or 0.25  grams of rn-222 will remain, and thus the fraction remaining is 0.25 or 1/4.