1.单选题- (共5题)
A.P4和NO2都是共价化合物 |
B.CO2和SiO2具有相同的化学键类型和晶体类型 |
C.在CaO和SiO2晶体中,都不存在单个小分子 |
D.甲烷的结构式:![]() |
A.钠与氯气反应生成氯化钠后,其结构的稳定性增强 |
B.阴阳离子之间有强烈的吸引作用而没有排斥作用,所以离子键的核间距相当小 |
C.失电子难的原子获得电子的能力一定强 |
D.两个原子之间的相互作用叫化学键 |
①CaCl2属于离子晶体②SiCl4是分子晶体③NaCl熔融可导电④MgCl2水溶液不能导电
| NaCl | MgCl2 | CaCl2 | SiCl4 |
熔点(℃) | 801 | 712 | 782 | -68 |
沸点(℃) | 1465 | 1418 | 1600 | 57 |
正确的说法有( )
A.仅① | B.仅② | C.①和② | D.①、②和③ |
2.选择题- (共8题)
阅读短文,下列问题
Everybody wants to be healthy. You know food is very important.There are many healthy foods. You can have more bananas, apples, oranges,tomatoes and lettuce because fruits and vegetables are good for you. But don't eat too much chocolate. It's not good for you. But don't eat too much chocolate. It's not good healthy food. Healthy food can make you grow and make you strong and happy. Remember there is a saying, “An apple a day keeps the doctor away.” Sports can also keep you healthy. Get up early and do some sports every day. Don't be lazy! You will be healthy and happy.
阅读短文,下列问题
Everybody wants to be healthy. You know food is very important.There are many healthy foods. You can have more bananas, apples, oranges,tomatoes and lettuce because fruits and vegetables are good for you. But don't eat too much chocolate. It's not good for you. But don't eat too much chocolate. It's not good healthy food. Healthy food can make you grow and make you strong and happy. Remember there is a saying, “An apple a day keeps the doctor away.” Sports can also keep you healthy. Get up early and do some sports every day. Don't be lazy! You will be healthy and happy.
阅读短文,下列问题
Dear Liz,
My stay in Thailand has certainly been the experience of my life.
Life is busy and exciting. Bangkok is just like any other big city with a population of 10 million and heavy traffic. I'm very lucky because my host family is in a nice quiet area outside the city. There are Mr. and Mrs. Phairat,their son Sanan, who is 18,the daughter Chinda, who is 16, and Grandpa and Grandma.
I go to an international school with Sanan and Chinda. The school teaches about 70 percent in English, and 30 percent in Thai. I've learned some spoken language, but Thai writing is very difficult. The cooking lesson is my favourite. I'm learning all about Thai food and culture. People don't use chopsticks here, but spoons and forks. When I come back, I'm going to cook you a real Thai meal.
Last weekend we visited some temples. We also drove to Pattaya beach near Bangkok. I thought it was great, but Sanan and Chinda say that next month they're taking me to Phuket Island, where the beaches are even more beautiful. The month after next, we're going to travel to Mr. Phairat's hometown in the north of Thailand. The Phairats own land there, and they have two elephants. I'm going to ride those elephants—and even wash them. Sanan and Chinda say it's really fun.
I'm amazed by everything in this country, especially by the elephants. Elephants are an important part of Thai culture and way of life.They have been a traditional symbol (象征) of Thailandfor many years in times of war and peace. In the seventh century, a Thai king trained 20,000 elephants for battle. I'll tell you all about my Thai boxing(拳击)lessons next time I write.
Love,
Mandy
3.填空题- (共3题)
(1)熔化时不需要破坏化学键的是________,熔化时需要破坏共价键的是________,
熔点最高的是________,熔点最低的是________。
(2)属于离子化合物的是________,只有离子键的物质是________,晶体以分子间作用力结合的是________。
(1)A的最高价氧化物对应的水化物是_______(填化学式);
(2)物质E中所包含的化学键有________,写出C、D两元素形成的化合物C2D的电子式_________;
(3)在同主族氢化物的递变性质中,A的氢化物沸点反常,这可以用 解释。
A.共价键 B.离子键 C.氢键 D.范德华力
(4)与C同主族且处于第七周期的元素的原子序数是 .
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【1】题量占比
单选题:(5道)
选择题:(8道)
填空题:(3道)
-
【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:0
5星难题:0
6星难题:6
7星难题:0
8星难题:1
9星难题:1