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 these statements is correct.

Question

Quizplus · Accepted Answer

As the oxidation number on the metal increases, the valence-state electronegativity increases and the oxides tend to become more basic. However, there are some exceptions to this trend, and chromium and manganese oxides are among them. As their oxidation state increases, their oxides tend to become more acidic. Therefore, statement B is the correct characterization for these oxides.

Chromium and Manganese Are Among the Transition Elements That Form