物质的结构是决定物质性质的重要因素。请回答下列问题: (1)基态Ni原子核外电子

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问题:

物质的结构是决定物质性质的重要因素。请回答下列问题:

(1)基态Ni原子核外电子排布式为____________;第二周期基态原子未成对电子数与Ni相同且电负性最小的元素是_______________。

(2)NiO、FeO的晶体结构类型均与氯化钠的相同,Ni2+和Fe2+的离子半径分为0.069nm和0.078nm,则熔点NiO____________FeO(填“<”或“>”);NiO晶胞中Ni2+的配位数为____________。

(3)肼可用作火箭燃料,燃烧时发生的反应是:N2O4+2N2H4=3N2+4H2O,若该反应中有4molN—H键断裂,形成的键有________mol。

(4)金属镍与镧(La)形成的合金是一种良好的储氢材料,其晶胞结构示意图如图1所示.该合金化学式为        

(5)丁二酮肟常用于检验Ni2+:在稀氨水介质中,丁二酮肟Ni2+反应可生成鲜红色沉淀,其结构如图2所示:

①该结构中,碳碳之间共价键是σ键,碳氮之间共价键是        ,氮镍之间形成化学键是     

②该结构中,氧氢之间除共价键外还可存在    

③该结构中,碳原子杂化轨道有            

考点:物质性质的研究
题型:填空题

阅读理解。

     At the Beijing time 14:28 May 12, 2008, a strong earthquake suddenly happened in Sichuan Province.

     As they saw a young woman in broken houses, the rescue (营救) workers were sad to find that she

had already been dead, yet surprised to notice her kneeling down with her hands touching the ground to

support her weight - and right under her shelter of flesh and blood (血肉), her several - month - old baby

was sleeping, safe and sound.

     The baby was put around carefully in a little quilt (被子), with a mobile phone inside. An unsent text

message was found that read:

     "Dear Baby, if you Could Be Alive, Please Remember That Mum Always Love You!"

     As it was too young to know what was really going on, the baby's dream must have been free from

nightmare (恶梦), though a nightmare was taking place. However, it was the mother's love that prevented

the nightmare from falling upon the young dreamer.

     Mother's love at her last breath!!!

1. It was _______ when the baby was found.

A. crying

B. dying

C. sitting

D. sleeping

2. The mother knelt down with her hands touching the ground in order to _______.

A. have a rest

B. save her baby

C. protect herself

D. prevent the nightmare

3. Which of the following is true about the text message?

A. It was a message to the baby's father.

B. It had already been sent out when found.

C. The mother hoped that her baby could live.

D. The mother wouldn't like the message to be found.

4. The passage is mainly about _______.

A. mother's love

B. Sichuan earthquake

C. a lucky baby

D. the last breath

题型:填空题

函数y=(k2-4)x2+(k+1)x是正比例函数,且y随x的增大而减小.则k=______.

题型:填空题

一般来说,经常项目顺差表明当期国内储蓄与国内投资的关系是( )。

A.储蓄等于投资
B.储蓄大于投资
C.储蓄小于投资
D.储蓄等于国内固定资产投资与证券投资之和

题型:填空题

下列不属于压力管理策略的是______。

A.减少压力来源

B.改善认知模式

C.发展应对技能

D.培养防御策略

题型:填空题

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