问题 判断题

(12分)甲、乙、丙、丁为前三周期元素形成的微粒,它们的电子总数相等。已知甲、乙、丙为双原子分子或负二价双原子阴离子,丁为原子。

(1)丙与钙离子组成的离子化合物跟水反应产生一种可燃性气体,反应的化学方程式是

_______________________________________________。

(2)乙在高温时是一种还原剂,请用化学方程式表示它在工业上的一种重要用途:

________________________。

(3)在一定条件下,甲与O2反应的化学方程式是________________________。

(4)丁的元素符号是____________,它的晶体类型是____________。

(5)丁的氧化物的晶体结构与____________的晶体结构相似。

答案

(1)CaC2+2H2O====C2H2↑+Ca(OH)2

(2)Fe2O3+3CO2Fe+3CO2(其他合理答案亦可)

(3)N2+O2 2NO

(4)Si 原子晶体  (5)金刚石

(1)丙为,与Ca2+结合为CaC2,跟水反应生成C2H2

(2)具有14个电子,则具有14电子的还原性微粒应为CO,乙为CO。工业上可用CO冶炼金属。

(3)具有14个电子的双原子分子,还有N2,甲为N2,与O2反应生成NO。

(4)丁为原子,具有14电子微粒的原子是Si,能形成原子晶体。

(5)SiO2与金刚石(或硅晶体)结构相似。

阅读理解
阅读理解。
          Friendship Restaurant
     We have different kinds of
Japanese food here. The food
menu is in Japanese and Chinese.
All the waiters or waitress can
speak at least one foreign
language.
Tel: 312-9997
Time: 11:30 am-10:00 pm
          Volunteer Project
     Maybe you want to help
others but don't know how to
do it. Then Volunteer Project
will help you. Here you will
get the best idea of
volunteering.
Call 822-5566 to join it.
Email: lisa@hotmail.com
       Dream Corner
     Do you want to
improve your English?
Do you want to practice
your English with native
speakers? If yes, why
not join the Dream Corner?
Come here on Friday
afternoon every week.
               Red Bird Club
     Do you like dance? Do you
want to show off your cool dance
at parties? Join us and make your
dream come true.
Closed on Tuesday.
Call 822-3331 for more
information.
           The Underwater World 
     Here you will find different kinds
of fishes and even some kinds of
sharks. You will feel you are in the
sea but of course this is not true. If
you like fishes, I suggest that you
pay a visit to it.
Time: 9: 30 am-5: 30 pm.
1. In the Friendship Restaurant you can eat _____ food.
A. Chinese
B. Japanese
C. English
D. French
2. Sarah wants to do some volunteer work. She can call _____ to get some ideas.
A. 846-3809
B. 312-9997
C. 822-3331
D. 822-5566
3. Red Bird Club is closed on _____.
A. Tuesday
B. Monday
C. Saturday
D. Thursday
4. According to the ad, you can see _____ in the Underwater World.
A. volunteers
B. excellent dancers
C. sea animals
D. waiters and waitresses
5. If you want to practice English with native speakers, you can join _____.
A. the Red Bird Club
B. the Volunteer Project
C. the Dream Corner
D. the Underwater World
单项选择题