已知X、Y、Z、W四种元素是元素周期表中连续三个短周期的元素,且原子序数依次增大.X、W同主族,Y、Z为同

2025-04-06 01:56:39
推荐回答(1个)
回答(1):

X、Y、Z、W四种元素是元素周期表中连续三个短周期的元素,且原子序数依次增大.原子最外层电子数是次外层电子数的3倍,Z原子有2个电子层,最外层电子数为6,则Z为O元素;Y、Z为同周期的相邻元素,Y的氢化物分子中有3个共价键,则Y为N元素;W原子的质子数等于Y、Z原子最外层电子数之和,则W原子质子数为6+5=11,则W为Na元素;X、W同主族,X的原子序数最小,则X为氢元素,
(1)由上述分析可知,X为H元素,Z为O元素,处于周期表中第二周期ⅥA族,
故答案为:H;第二周期ⅥA族;
(2)由以上元素中的两种元素组成的物质中有一种能与H2O反应释放出空气中的主要成分之一的气体,则该物质为Na2O2,其电子式为,含有化学键类型为:离子键、共价键,
故答案为:;离子键、共价键;
(3)由H、N、O所形成的常见离子化合物的化学式为NH4NO3,它与W的最高价氧化物的水化物NaOH的浓溶液加热时,反应的离子方程式为:NH4++OH-

  △  
 
NH3↑+H2O,
故答案为:NH4NO3;NH4++OH-
  △  
 
NH3↑+H2O;
(4)在由H、N、O、Na四种元素形成的常见化合物或单质中,可以形成分子晶体如水,可以形成离子晶体如NaOH或金属晶体如Na,不能形成原子晶体,
故答案为:原子晶体.

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