Which is NOT a characteristic property of metals resulting y+ pyp9 hc8md;from metallic bonding?ydm;cp hy8 9p+

Metallic bonding characterz q3ss :8gee,:qcm/om izes the bonding present in the elemental form of the m3 :zc:mqqom e8,sge /setals on 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.

  Metallic bonding is best cho9, yn7qd zjeuco0ed s 357rx*aracterized by the following statement:

  Which of the following is NOT true of me(2r11pku nd qk6ippi5tals?

Properties of substances cr;5dg v w2:sdiyaxj17an be related to the type of bonding, including electrical conductgwvx d;2yi:d 1js7a 5rivity.
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 corresponds to, or indicaudet28soq r7.fh89og 4n*cy qtes, the strength of metallic be gf8hu.n2 7qo*ctdr4 oq8ys9onding?

Titanium, lithium, and potassium have meltinq4/ok2 o6rfh/prs /,ttml ( hmg 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 seriesu ;,*bvzz oee. correctly orders the elements by increasing melting zoezu;.bv,e * points?

  The oxides of two period 3 elements, X and Y, react;uc nmggoeuw et/ca).8 n)9(,j :utvu in water according to the equawevn:j, cug)eng o;u)c( au9tm t8u/.tions 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  ----待选择----XY  will have a higher melting point than element  ----待选择----XY 

  1.Explain the difference in p fg2t3a/pffz 0hysical properties of the following using knowledge of chemical structure and bonzp30t/ f2 fgfading:
.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 regarding metallic bon-w-u vk +rkn aw-o8/9va emhn2ding 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 grog5 rx :b)0.zqhb6yz qx+vkv*gup 1 of the periodic table. The group 1 metals react with bromine to form soluble bromide salts, which all have *.xbr z +0z6g 5qb:xqvyvhk)gthe 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 followih9tr9umj f:11 pymsa +28y u:i zlpxs+ng are characteristics 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 results in high etg vvh4 )2 ffnodp *iq94w1v2alect2oqfn)fdgph* t4v91w 4vva i2rical conductivity?

  When comparing Ca to Ni, which r j7.iw cvi)vc7 ,0twsof the following is true?

  Vanadium and titanium are both common me8irr ,ziun ;y;,anmza/r ,1futals in aerospace engineering because they have a high strength to weight nz;iaur,z;yrr 8n,uma f /i, 1ratio.
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.