Cho dãy các kim loại: Al, Na, Be, Mg, K, Ba, Fe. Số kim loại trong dãy phản ứng được với H2O ở điều kiện thường là  

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Choose the word that has the underlined part pronounced differently from the rest:

  harm                    wash                         call                        talk

• Choose the word that has the underlined part pronounced differently from the rest:

  perform                 series                     period                     stereo

• Find a mistake in the four underlined parts of the sentence and correct it:

  I found that the number of universities which accept foreign students have been increasing.

• Find a mistake in the four underlined parts of the sentence and correct it:

  Never I have seen such an excited film.

• Find a mistake in the four underlined parts of the sentence and correct it:

  The news are on TV soon.

• Choose the best answer for the following sentence:

  He is not only helpful but generous ___________________.

• Choose the best answer for the following sentence:

  I am punctual, ___________________?

• Choose the best answer for the following sentence:

  Go out with us, __________________________?

• Choose the best answer for the following sentence:

  On the first of next month, he _________________________ for five years.

• Choose the best answer for the following sentence:

  We ___________________ in love since I _____________________________________ her again after we _______________________ touch with each other for three years.