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习题练习:Models of Bonding & Structure B.3 The Metallic Model



 作者: admin   总分: 17分  得分: _____________

答题人: 匿名未登录  开始时间: 23年07月17日 23:30  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which is NOT a characteristic property of metals resulting from m5jl 1 pdcb7j)fs bzb63etallic bondingf573jp6dc1sbbbj )lz ?

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2#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Metallic bonding characterizes the 5r iv:,outfmer8h0x-v 3qmx, bonding present in the elemental form of the metals r 0tq:fm8o3,,v -mex5vx rhiuon the periodic table.
1.Describe features of metallic bonding.
2.Describe 3 common properties of metals that result from metallic bonding.
3.Solid sodium chloride is brittle while sodium metal is not. Explain this difference in properties.
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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Metallic bonding is best characterizediv*-zn-fsy w4 by the following statement:

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the following is NOT true0sv+cdt gdn, . of metals?

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5#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Properties of substances can be related to the type oft / vnu)g;))xiw 2cdc2jyp4w- 7.dibca )pi kf bonding, including electrical conductivity. n. b )cyput fg7w2x)c2j d-;ka wicpv/d) i)4i
1.In part (a) of the table below, state examples of one metallic and one non-metallic substance that are electrically conductive.
2.In part (b) of the table below, draw a diagram that demonstrates the bonding of each substance mentioned in part (a).
3.In part (c) of the table below, state why this bonding structure enables electrical conductivity.

Non-metallic Metallic
(a)Substance with electrical conductivity
(b) Diagram or model of structure
(c) Reason for Conductivity
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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which characteristic best corresponds to, orhf o0z 8t7zk7 f6 vojn*jk5e0emtl,1v indicates, the strength of metallic boel ent1jzvfk 8v*kmf 7,oo50 zt0hj 67nding?

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7#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Titanium, lithium, and potassc vd) zd0i/0wl:ff 18wydb mg*ium have melting points of 1910$^{\circ}C$,181$^{\circ}C$,and 68$^{\circ}C$,respectively.
1.Outline two characteristics of a metallic element that affect the strength of the metallic bond.
2.In terms of atomic structure, the observed melting points of titanium, lithium, and potassium listed above.
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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Based on periodic trends, which :yymlw(i v9pv t dv6o-9:s1bgseries correctly orders the elements by increasing melti9g-pw6:vyl9d(s t v :viomyb1ng points?

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9#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The oxides of two period 3 elements, X and Y, react in water according s/ *i)kdi: c-sovp+mdto the equationsso dv/+:c* idpk-m i)s below.
I. $XO_{2(s})$ + $H_2O_{l}$→$H_2XO_{3(aq)}$
II. $YO_{2(s})$ + $H_2O_{l}$→$Y(OH)_{2(aq)}$
1.Identify elements X and Y. Element X is   ;Element Y is   .
2.Predict whether element X or Y would have a higher melting point. Element    will have a higher melting point than element  

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10#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  1.Explain the difference in physical properties of the followi1t fxi0 1garm-/wnx9laix::z ng using knowledge of chemical structurer ia/nxt:fgi- w19z: a10x mxl and bonding:
.1.The boiling point of hydrochloric acid (HCl) is    than that of lithium chloride (LiCl).
.2.Calcium bromide ($CaBr_2$)    conduct electricity in a molten state and aqueous solution; Bromine ($Br_2$)   .
.3.The boiling point of HI is    than $I_2X$.
2.Arrange bromine ($Br_2$), potassium and potassium bromide in order of increasing boiling points.
  <  < 

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which statements regarding metallic bonding are correct?-e)t .hy*4 4,svrx5gh loxly ,s/ozp s
I.The higher the charge on the ion of a metallic element, the weaker the bond
II.A metallic element with a greater ionic radius will have a weaker metallic bonding
III.Metallic bond strength increases with the number of delocalized electrons

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12#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Lithium is a metal in group 1 of the periodic t*b*xj z83aqx mable. The group 1 metals react with bromine to form soluble bj*a* z bmxx83qromide salts, which all have the same lattice structure.
1.The melting points of the group 1 metals and their bromide salts are shown in the graph.


1.Explain the variation in the melting points of the group 1 metals.

2.The following diagram shows the electron density distributions formed when bromide ions interact with lithium and sodium ions.

Based on the diagram, suggest why the melting point of lithium bromide is lower than that of sodium bromide.
2.Lithium is a good electrical conductor, whereas lithium bromide is an electrical insulator.
.1.Explain the difference in the electrical conductivities of lithium and its bromide salt.
.2.Explain how water interacts with lithium bromide to produce an electrically conductive solution.
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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the following are characteristics of transition elea (wtuit,w6f5t8o 9au ments?
I.High melting points
II.Soft
III.Electrically conductive

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the following explains why transition metals have high melting points?

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the following characteristics of transition metals results in hiql6 xyx0uq:r0-8 tt6teh y 5cbgh electrical condqh6 -y x tu8ctbx 00qye:tl6r5uctivity?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When comparing Ca to Ni, which of the followiniihc vm-8t37 ,wcdq4 lg is true?

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17#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Vanadium and titanium are both common metals in kc 9alz 1jl p+rrtn0exv) 8 0z7cw(*joaerospace engineering because they have a high strength to weight +kc0jrex*9(0 1zt lzlroac) v7 wjn 8pratio.
1.vanadium has a    melting point than titanium.
2.Titanium and vanadium are both able to conduct electricity. Explain how this is possible.
3.Tin is not a good choice for use in aerospace engineering. Predict, with a reason, why this is so.

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