有下列四种微粒:① 18 8 O ② 23 11 Na ③ 24 12 Mg ④ 14 7 N (1)按原子半径由大到小顺序排列的是______. (2)微粒中质子数小于中子数的是______. (3)在化合物中呈现的化合价的数值最多的是______. (4)能形成X 2 Y 2 型化合物的是______,能形成X 3 Y 2 型化合物的是______.
【简答题】Dear Friend. The recent success of children’s books hasmade the general public aware thatthere's a huge market out there. 21 And there's a growing need for new writerstrained to create the $ 3 billio...