[单选题]
The reaction of solid magnesium with gaseous oxygen is shown.
Mg(s) + $\frac{1}{2}$$O_2$(g)→MgO(s)
Which of the following correctly describes the process of MgO(s) formation?
A. Magnesium atoms lose electrons to produce magnesium cations
B. Magnesium atoms lose electrons to produce magnesium anions
C. Magnesium atoms gain electrons to produce magnesium cations
D. Magnesium atoms gain electrons to produce magnesium anions
参考答案:
A
本题详细解析:
Oxidation reaction; Magnesium is much less electronegative than oxygen, so the Mg atoms lose electrons to the O atoms during the reaction. This process forms positive $Mg^{2+}$ ions, termed cations, and negative $O^{2-}$ ions, termed anions.
This question is categorized as easy, as the student must recall two pieces of information that are covered extensively in the syllabus.
