Các ion Na⁺, Mg²⁺, O^2-, F^- đều có cùng cấu hình electron. Thứ tự giảm dần bán kính của các ion trên là

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose a word that has different stress pattern:

  advance             aquatic               discharge            deepen

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

  most               host                 lost               frost

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

  sun             sure              success            sort

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

  new               sew                few             nephew

• Choose a word that has different stress pattern:

  improvement                engraving              maintenance              spectacular

• Choose a word that has different stress pattern:

  goodbye              hostess                martyr             survey

• Choose a word that has different stress pattern:

  expand            decrease              notify              appoint

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

  rugby          gather         forget          gymnast

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

  throne             there              theory           three

• Choose a word that has different stress pattern:

  dedicate              belong              enlist            impress