Chromium and manganese are among the transition elements that form several different oxides. Which of the following statements characterize these oxides?
A) As the oxidation number on the metal increases, the valence-state electronegativity increases and the oxides change from acidic to basic.
B) As the oxidation number on the metal increases, the valence-state electronegativity increases and the oxides change from basic to acidic.
C) As the oxidation number on the metal increases, the valence-state electronegativity decreases and the oxides change from acidic to basic.
D) As the oxidation number on the metal increases, the valence-state electronegativity decreases and the oxides change from basic to acidic.
E) None of the above statements is correct.

Question

Quizplus · Accepted Answer

As the oxidation number on the metal increases, the valence-state electronegativity increases and the oxides change from basic to acidic. This is known as the trend of oxidizing nature, where the oxides of transition metals become more acidic as the oxidation state increases. This is due to the increasing attraction between the metal and oxygen atoms in the oxide as the oxidation state increases, making the oxide more acidic.

Chromium and Manganese Are Among the Transition Elements That Form