问题 选择题

已知M、W、X、Y、Z是短周期中原子序数依次增大的5种主族元素,其中W、Z同族,M原子的最外层电子数是电子层数的3倍,元素X在同周期的主族元素中原子半径最大,Y是地壳中含量最多的金属元素。下列说法中正确的是

A.气态氢化物稳定性最强的是HZ

B.原子半径由小到大的顺序为W<M<Y

C.室温下,可用Y的容器盛装稀硝酸

D.X的单质可通过电解XZ的水溶液获得

答案

答案:B

题目分析:根据题意知,M、W、X、Y、Z是短周期中原子序数依次增大的5种主族元素,M原子的最外层电子数是电子层数的3倍,则M为氧元素,W的原子序数大于M,W、Z同族,则W是氟元素,Z是氯元素,元素X在同周期的主族元素中原子半径最大,则X是钠元素,Y是地壳中含量最多的金属元素,则Y为铝元素。A、题给元素中非金属性最强的元素是氟,则HF的稳定性最强,错误;B、根据微粒半径比较原则判断,原子半径由小到大的顺序为W<M<Y(F<O<Al,正确;C、室温下,铝和浓硝酸能发生钝化现象,和稀硝酸反应生成硝酸铝,不可用铝制容器盛装稀硝酸,错误;D、钠的单质可通过电解熔融的NaCl获得,错误。

阅读理解

阅读短文,选择正确答案。

     Do you know how to write an English letter? When we write a letter in Chinese, we always put the date at

the end of the letter. But it is different in English. We have to put it on the top of the right corner. And above the

date, we also write the number of our house and the names of our street, city and country. To begin the letter,

we always use words like "Dear sir", "Dear Mr. / Miss / Mrs.…" At the end of the letter, we usually use words

like "Yours" "Yours ever" or "Truly yours". It is also different to write an English envelope (信封). If to an

American friend Jane Shute, write your name and address on the top of the left corner and write hers in the

middle. Now read the following envelope, please.

Qin Ling                                                        

No.11 Middle School                                  STAMP       

Zibo, Shandong, P.R.C. Miss

Jane Shute 65

King Street, New Town

Sydney, Australia

1. "We have to put it on the top of the right corner," The word "it" here means _____. [ ]

A. the date

B. the letter

C. the envelope

D. the passage

2. From the passage, we know when we write an English letter, we should put down our address            . [ ]

A. at the end of the letter on the left

B. at the end of the letter on the right

C. at the top of the letter on the left

D. at the top of the letter on the right

3. How do you begin your letter if you write to Peter White? [ ]

A. Peter

B. Mr. Peter

C. Dear Mr. White

D. Dear Sir Peter

4. To what country will the letter be sent? [ ]

A. P.R.C.

B. America

C. Australia

D. Sydney

5. Who writes this letter? _______. [ ]

A. Zibo

B. Qin Ling

C. MISS Shute

D. Miss Jane

判断题