問題詳情
4. Which of the following statements is true?
(A) The number of neutrons is the same for all neutral atoms of an element
(B) Alkali metals form ions with a 2+ charge when they react with nonmetals.
(C) The molecule SO2 has two resonance structures.
(D) The total energy of the universe decreases, while the entropy decreases.
(E) none of these
參考答案
答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增