已知X、Y、Z、W是短周期中四种非金属元素,它们的原子序数依次增大.X元素原子形成的离子就是一个质子,Z

2025-03-17 03:08:00
推荐回答(1个)
回答1:

X、Y、Z、W是短周期中四种非金属元素,它们的原子序数依次增大,X元素原子形成的离子就是一个质子,则X是H元素,Y原子的最外层电子数是内层电子数的2倍,最外层电子不能超过8,所以Y的内层电子是2,则Y是C元素,Z、W在元素周期表中处于相邻的位置,它们的单质在常温下均为无色气体,且Z的原子序数小于W,所以Z是N元素,W是O元素.
(1)通过以上分析知,X、Y、Z、W分别是H、C、N、O,故答案为:H、C、N、O;
(2)这四种元素可组成原子个数比为5:1:1:3的化合物(按X、Y、Z、W的顺序),即该化合物中含有5个氢原子、1个碳原子、1个氮原子和3个氧原子,4个氢原子和一个氮原子形成铵根离子,剩余的元素形成碳酸氢根离子,所以该化合物的化学式为NH4HCO3,该混合中铵根离子和碳酸氢根离子之间存在离子键,铵根离子中氮原子和氢原子之间存在配位键、共价键,碳酸氢根离子中氧原子和碳原子之间存在共价键,所以含有的化学键为:离子键、共价键和配位键,
故答案为:NH4HCO3,离子、共价、配位.

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