Calculate the predicted boiling point for krypton,Kr,given the boiling points of xenon,Xe, (-107 °C)and radon,Rn, (-62 °C).

Question

Quizplus · Accepted Answer

Both xenon and radon are in the same group as krypton on the periodic table (Group 18, the noble or inert gases). As we go down the group, the boiling points generally increase due to the increasing size and number of electrons in each atom. Since krypton is in between xenon and radon in the group, we can predict that its boiling point should be between the boiling points of xenon and radon.

Using this logic, we can estimate the predicted boiling point of krypton to be around (-85 °C + (-62 °C))/2 = -73.5 °C. However, this is only an estimate and not the exact answer.

Looking at the answer choices, (-152 °C) is the closest to our estimate and is therefore the best choice.

Calculate the Predicted Boiling Point for Krypton,Kr,given the Boiling Points