6. How many of the following statements are correct?
I. All the group 13 elements are metals.
II. Alkaline earth metals react less vigorously with water than do alkali metals.
III. Salts can consist of hydrogen.
IV. Because Li has a more negative standard reduction potential than Na and K, it reacts most quickly with water among these three alkali metals.
V. BeO is amphoteric.
(A) 1
(B) 2
(C) 3
(D) 4
(E) 5
阿摩線上測驗
登入
