Which is NOT a characteristic property of msfe*q:b c)v .betals resulting from metallic bondingbqcs)*.v:feb ?

Metallic bonding characterizes the bonding present in the elfgio1 kwh2+veux+ 5i 1y7w 5gms-7 jejemental form of the metals on thvieg5-1js mfwg5w7ie 7o+1 kjx+ h 2uye 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.

  Metallic bonding is best characterized by the fxug(bqkz epn+-3phze p* ce7f)*4 6t following statement:

  Which of the following is NOT true of meoojx .gs0/ u)etals?

Properties of substances can be related 3.sz4x8 hm04jm ogys: c cd;hbto the type of bonding, including electrical cg y4b;84xochzd mm :c0j3 sh.sonductivity.
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

  Which characteristic best correspond k7xv +ed-xc4qs to, or indicates, the strength of metallic bondin-ev +xdcxq4 k7g?

Titanium, lithium, and 5)9q tvu 9sv .ut7gunhpotassium 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.

  Based on periodic trends, which series correctly oj1l61*pd /85rmo a;imyyxrh vrders the elements by increasiar;5ry1h1vm6j d 8ly opmxi*/ng melting points?

  The oxides of two period 3 elements, X and Y, react in water)2n/mrp, xoqpy 9fbdh f7/ih* according to the equations belofiq* 7h) prmhd / /y2f9oxbp,nw.
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  ----待选择----XY  will have a higher melting point than element  ----待选择----XY 

  1.Explain the difference in physical properties of the following us: zd5a w/g5osb* is*bning knowledge of chemi n5*og*ib bs: a/w5dszcal structure and bonding:
.1.The boiling point of hydrochloric acid (HCl) is  ----待选择----lessmore  than that of lithium chloride (LiCl).
.2.Calcium bromide ($CaBr_2$)  ----待选择----cancannot  conduct electricity in a molten state and aqueous solution; Bromine ($Br_2$)  ----待选择----cancannot .
.3.The boiling point of HI is  ----待选择----lowerhigher  than $I_2X$.
2.Arrange bromine ($Br_2$), potassium and potassium bromide in order of increasing boiling points.
 ----待选择----brominepotassiumpotassium bromide ＜ ----待选择----brominepotassiumpotassium bromide ＜ ----待选择----brominepotassiumpotassium bromide 

  Which statements regardin)6i;-vmsr+aj chn6sbl xo7a 1g metallic bonding are correct?
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

Lithium is a metal in group 1 of the periodic table. The gpuix82:/89 yoq qgom ngs 4n,aroup 1 metals react with bromine to form soluble bromidxyqsm9p8 a o8 ou/ 4gn:igqn2,e 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.

  Which of the following are charact1oj1i tn+9und eristics of transition elements?
I.High melting points
II.Soft
III.Electrically conductive

  Which of the following explains why transition metals have high melting points?

  Which of the following characteristics of transition metals resultjoi.ufrv uca 6a5, 8o7s in high electrical75u vjoi. ruoc6af8 ,a conductivity?

  When comparing Ca to Ni, which of the following is rl5oow0k txgte ,1 6b* vn7+nktrue?

  Vanadium and titanium are both common metals in aerospac3dphtyk r9*y9o 0ky6a*wo8 c ae engineering because thekywa*ahc *y9 p3doy0t o8r96k y have a high strength to weight ratio.
1.vanadium has a  ----待选择----higherlower  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.