Calculate the predicted atomic radius for selenium,Se,given the atomic radius of sulfur,S, (0.104 nm)and tellurium,Te, (0.143 nm).

Question

Quizplus · Accepted Answer

The atomic radius tends to increase down a group in the periodic table. Since selenium (Se) is between sulfur (S) and tellurium (Te) in the periodic table, its atomic radius should be between those of sulfur and tellurium. The given radii are 0.104 nm for sulfur and 0.143 nm for tellurium. The predicted atomic radius for selenium would logically be an average of these two, which is (0.104 nm + 0.143 nm) / 2 = 0.1235 nm, which rounds to 0.124 nm, making option C the correct choice.

Calculate the Predicted Atomic Radius for Selenium,Se,given the Atomic Radius