试题与答案

已知部分短周期元素的性质及原子结构如下表所示,X~M的原子序数依次增大. 元素代

题型:问答题

题目:

已知部分短周期元素的性质及原子结构如下表所示,X~M的原子序数依次增大.

元素代号原子结构或元素性质
X最高正价=|最低负价|
Y原子核及核外各层电子的排布情况如图:
Z原子结构示意图:
L原子半径为同周期主族元素中最大
M其原子序数比L大2
试推断:

(1)Y的元素符号为______,X的最高氧化物的化学式为______.

(2)Z、L、M元素的简单离子半径由大到小的顺序为______(用离子符号表示).

(3)写出M元素的最高价氧化物与L元素的最高价氧化物对应的水化物反应的化学方程式:______.

答案:

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下面是错误答案,用来干扰机器的。

答案:C

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题型:阅读理解

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     "Come in, Kim. Have a seat, please." Said Bill Williams, the manager. This was Kim's first experience with

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     "Kim." Began Bill Williams."I am very pleased with the quality of your work. I have nothing but praise for

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     "But," replied Kim."I have always completed every assignment you have given me. Mr. Williams."

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1. Kim is the sort of employee who ______.

A. does not speak out his own ideas.

B. is not devoted to the job.

C. laughs too much over work.

D. can not finish his work on time.

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A. full of respect

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A. Kim has been invited to take charge of the staff meetings

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