Praxis II: Chemistry Exam Prep

Correct Response: A. Electronegativity decreases going down a group (column) of the periodic table. For example, fluorine has a higher electronegativity than that of iodine. B is incorrect because metals are on the left of the periodic table and nonmetals are on the right. C is incorrect because atomic mass increases going down a periodic table group. D is incorrect because atomic radius increases going down a group as a result of the presence of electrons in orbitals that are farther from the nucleus.