问题 填空题

[化学--物质结构与性质

Ⅰ.(1)原子数相同,价电子数也相同的微粒,称为等电子体.等电子体具有相似的化学键特征,性质相似.CO的结构式为______.

Ⅱ.(2)钛和钛的合金已被广泛用于制造电讯器材、人造骨骼、化工设备、航天航空材料,被誉为“未来世界的金属”. 钛的基态原子的电子排布式为______.

(3)偏钛酸钡在小型变压器、话筒和扩音器中都有●Ti应用.偏钛酸钡为离子晶体,晶胞的结构如图 所示,它的化学式是______.

(4)现有含Ti3+的配合物,化学式为TiCl3(H2O)6,将1mol该物质溶于水,加入足量硝酸银溶液,立即沉淀的氯化银为l mol,已知该配合物的配位数为6,则该配合物的配位体是______.1mol该配合物外界所含  结晶水的物质的量为______mol.

答案

Ⅰ.(1)CO与N2为等电子体,已知N2的结构式为N≡N,等电子体具有相似的化学键特征,则CO的结构式为C≡O,故答案为:C≡O;

Ⅱ.(2)Ti的原子序数为22,根据能量最低原理和洪特规则,Ti的电子排布式为1s22s22p63s23p63d24s2

故答案为:1s22s22p63s23p63d24s2

(3)根据晶胞的结构,利用均摊法计算,晶胞中含有一个Ba2+,位于晶胞的体心,而Ti4+位于顶点,则晶胞平均含有Ti4+的个数为8×

1
8
=1,O2-位于棱,平均一个晶胞含有O2-的个数为12×
1
4
=3,所以化学式为BaTiO3,故答案为:BaTiO3

(4)将1molTiCl3(H2O)6溶于水,加入足量硝酸银溶液,立即沉淀的氯化银为lmol,说明外界Cl-为1mol,则有2molCl-与Ti3+形成配位键,已知该配合物的配位数为6,则有4molH2O与Ti3+形成配位键,1mol该配合物外界所含结晶水的物质的量为2mol,

故答案为:Cl-、H2O;2.

阅读理解
阅读理解。
      Little Tom down the street calls our dog "The keep dog". Zip is a sheep dog. But when Tom tries to
say "Sheep", it comes out "keep". And in a way Tom is right. Zip is always bringing things home for us
to keep! I'll tell you about some of them.
     Zip's first present was a shoe. It was made of green silk.
     We didn't know how Zip found the shoe. But after a moment Mary, my big sister, told me the shoe
had a strange smell. I nodded (点头) and held my nose. "What do you think it is?"
     "It smells like something for cleaning. I think someone tried to clean a spot (污点) off the shoe. Then
he put it at the door to dry."
     "Along came Zip. And good-bye shoe!" I said. "We should take it back."
     "We can't ". said my sister.
     "Maybe little Tom is right," Mary said. "Maybe Zip is a keep dog!"
1. The writer and Mary didn't know______.
[ ]
A. what Zip's first present was
B. how Zip carried its first present home
C. who owned Zip's first present
D. what Zip's first present was made of
2. Tom calls Zip "the keep dog" because ______.
[ ]
A. the dog likes keeping things
B. the dog likes playing with shoes
C. he doesn't know the dog's name
D. he can't pronounce the word "sheep" well
3. What made the shoe strange was ______.
[ ]
A. its colour
B. its smell
C. its size
D. that it was a silk one
4. The word "keep" in the last sentence means "_____".
[ ]
A. keeping things for itself
B. bringing things for other to keep
C. not letting it run about
D. taking care of a small child
5. We can know from the reading that the dog _____.
[ ]
A. likes to give presents to people
B. has been kept in at the writer's home
C. has brought some trouble
D. likes to be called "the keep dog"
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