问题 填空题

(10分)下表列出前20号元素中的某些元素性质的一些数据:

元素

性质

ABCDEFGHIJ
原子半径(10-10m)1.022.270.741.430.771.100.991.860.751.17
最高价态+6+1+3+4+5+7+1+5+4
最低价态-2-2-4-3-1-3-4
试回答下列问题:

(1)以上10种元素中原子序数最小的是:         (填编号)。

(2)写出下列有关反应的化学方程式:

①E的单质与I元素的最高价氧化物对应的水化物反应:                  

②H2C2与EC2反应:                                              

(3)上述E、F、G三种元素中的某两种元素形成的化合物中,每一个原子都满足8电子稳定结构的是    (写分子式)。元素I、J形成的化合物可能是什么晶体     

(4)元素E与C及氢元素可形成一种相对分子质量为60的一元羧酸分子。其分子中含有的官能团            

(5)C和I相比较,非金属性较弱的是  (填元素名称),可以验证你的结论的是下列中的       (填编号)。

a.气态氢化物的稳定性和挥发性     b. 单质分子中的键能

c. 两元素得电子能力               d .含氧酸的酸性

e .氢化物中X—H键的键长(X代表C和I两元素)   f.两单质在自然界的存在

答案

除2个化学方程式各2分外,其余每空1分

(1)E(2)①C+4HNO3==CO2+4NO2+2H2O ②2Na2O2+2CO2==2Na2CO3+O2

 (3) PCl3或CCl4的电子式(略)原子

(4)羧基 (5)氮    ce

阅读理解

When a dirty and untidy orange cat showed up in the prison yard,I was one of the first to go out there and pet it.I hadn’t touched a cat or a dog in over 20 years.I spent at least 20 minutes,knelt down behind the kitchen as the cat rolled around,relaxed.What he was expressing outwardly, I was feeling inwardly.It was an amazing bit of grace to feel him under my hand and note that I was reaching a life or another creature with something as simple as my care.

Over the next few days,there were other prisoners responding to the cat.Every yard period,a group of prisoners gathered there.They stood around talking and taking turns petting the cat.These were guys you wouldn’t usually find talking to each other.Several times I saw an officer in the group,not chasing people away, but just watching and seeming to enjoy along with the prisoners.Bowls of milk and water appeared along with bread, wisely placed under the edge of the dustbin to keep the birds from getting it.

The cat was obviously homeless and in pretty bad shape.People said that the cat came to the right place.He's getting treated like a king.This was true.but as I watched I was also thinking about what the cat was doing for us.There was a lot of talk about what's wrong with prisons in America.We need more programs.We need more psychologists or treatment of various kinds.Some may even talk about making prisons more kind.But I think what we really need is a chance to practise our own kindness.Not receive it,but give it.After more than two decades here,I know kindness is not a value that's encouraged.It's often seen as a weakness.

Instead,the culture encourages keeping your head down,minding your own business,and never letting yourself be weak.

The cat did my heart good to see the effect he had on me and the men here.By simply saying,”I need some help here”,he did something important for us.He needed us.And we needed to be needed.I believe we all do.

小题1:From the passage,we can learn that the author was           

A.an animal protector

B.the cat owner

C.a prison officer

D.a prisoner小题2:Which of the following statements is true?

A.The cat was dirty because it was kept in prison.

B.The officer in the prison enjoyed petting the cat.

C.The prisoners prepared food for both the cat and birds.

D.The author realized the importance of practising kindness.小题3:We can infer from the third paragraph that              

A.showing love to others can make prisoners strong

B.the American prison culture will be improved

C.the author is not content with the prison culture

D.caring for others is encouraged in American prisons小题4:What is the best title for the passage?

A.Caring Makes Us Human.

B.Prison Culture is Important.

C.Animals Need Care.

D.Everyone Needs to be Cared for.小题5:In Paragraph 2,the author mentioned that “Several times I saw an officer in the group,not chasing people away, but just watching and seeming to enjoy along with the prisoners.”to              

A.show us the officer and prisoners get along well with each other

B.show us the American prison culture does need improvement

C.show us the officer and prisoners all like cat

D.show us the American prison culture is great

单项选择题