问题 填空题

有A、B、C、D、E五种元素,它们原子的核电荷数依次递增且均小于18;

A原子核内仅有1个质子;B原子的电子总数与C原子的最外层电子数相等; C原子有两个电子层,最外层电子数是次外层电子数的3倍;D元素的最外层电子数是其电子层数的三分之一.E的单质是黄绿色气体且有毒.

(1)写出A分别与B、C所形成化合物的化学式:______,______.

(2)分别写出C和D的原子结构示意图:______,______.

(3)写出C、D、E所形成的化合物的电离方程式:______.

(4)写出E的单质与A、C、D三元素所形成的化合物反应的化学方程式,若是氧化还原反应,请用双线桥标出电子转移的数目和方向:______.

答案

A原子核内仅有1个质子,应为H元素;C原子有两个电子层,最外层电子数是次外层电子数的3倍,应为O元素;

原子的电子总数与C原子的最外层电子数相等,应为C元素;D元素的最外层电子数是其电子层数的三分之一,应为Na元素;E的单质是黄绿色气体且有毒,应为Cl元素,

(1)A是H元素,B是C元素,C是O元素,则A分别与B、C所形成化合物分别是:CH4,H2O,故答案为:CH4;H2O;

(2)C是O元素,电子结构示意图为

,D是Na元素,电子结构示意图为

,故答案为:

(3)C、D、E所形成的化合物为NaClO,为强电解质,在溶液中完全电离生成Na+和ClO-离子,

电离方程式为NaClO═Na++ClO-,故答案为:NaClO═Na++ClO-

(4)E的单质与A、C、D三元素所形成的化合物反应的化学方程式为Cl2+2NaOH═NaCl++NaClO+H2O,反应中氯气自身发生氧化还原反应,化合价有0价分别变成-1价和+1价,

用双线桥标出电子转移的数目和方向的反应式为

故答案为:

阅读理解
阅读下面的短文,根据短文内容完成表格中所缺缺信息,每空一词。
     What is your favorite cartoon?It may be difficult for you to decide.But for pianist Lang Lang,Tom and
Jerry is the best one.
     When Lang Lang was two years old,  he saw Tom playing the piano.  This was his first time to enjoy
western music and this experience encouraged him to learn to play the piano.
     His talent at the keyboard has taken him from Shenyang to the world.
     Lang Lang became a good piano student at three. Ever since,the boy has been doing better and better. In 1997, the 15-year-old boy studied at a famous American music college.
     Lang Lang's performances are energetic. He is well-known for making facial expressions and moving
around while playing the piano.
     The road to success has never been easy. Lang Lang's father stopped his job to look after him, while
his mother stayed in Shenyang to make money. But Lang Lang considers himself lucky and believes he
should give something back. He has helped the children in poor areas a lot.
Personal 1   Card

About his personal life

      

Name 
Lang Lang 
Year of birth  2  
3        Keyboard
Favorite 4   Tom and Jerry
The reason for    poor childrenHe believes himself lucky and should give something
back.
About his musical life The   6   for western music in his childhood encouraged him to learn piano7     . With the help of his parents and teachers, he was able to   8    a famous American music college, where his success began.
Famous for  9 performances and 10  facial expressions and moving around while playing the piano.
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