Which is NOT a characteristic property of metalo4b u*3lmo wyj/9soowx2n 6.o s resulting from metallic bondingl9wu2nox3/*4m. woyboo6 s jo?

Metallic bonding characterizes the bonding present ins 0p j+nxpkep(aq4 yy).v/6em the elemental form of the metals kpsqn/+pvyj0ye() 4 .me6x pa 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 characterized by the following sta5h cet1:xqyvlae;(.3r jx0i y tement:

  Which of the followinopjmf vc-c.n) w8 h4*x7px r1kg is NOT true of metals?

Properties of substances can be vcl7 jw3mj 5c7 +-vuhsrelated to the type of bonding, including electrical c75 ljvvm3cuc+j-h 7 swonductivity.
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 correspozi2hmj;fcuc02k ;v54 s.xzsnicwa sgr w95; 3nds to, or indicates, the strength of metallic bonds5cx;n2zc 9sf;3kuaw;j2igs r5 mz0v c4 w.ihing?

Titanium, lithium, and potassium have melting poin -.g d0o.zluwhts 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 sq.yl l(cu gj;/eries correctly orders the elements by increasing meltj.ll/ cyug(q;ing points?

  The oxides of two period 3 elements, X and Y, react in water accor64 2hb re2dnvmding to the equations 22b46md he rvnbelow.
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 theienj f**qfx +cp(0;su following using knowledge of chemical structure and bondecqi*ux0f ( fn;* js+ping:
.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 regarddn.(x9dfwqhih-vcj1a +m 3z8 ing 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 tmb5 7gc;k2hvi able. The group 1 metals react with bromine to form soluble bromide salts, which all have the same lattih ; 7bki2mg5cvce 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 charactegshdc71s 0(, bfa ls2zristics 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 ch 2jj-4jb tnm;naracteristics of transition metals results in high electrical condj2bn-nj;m 4 tjuctivity?

  When comparing Ca to Ni, which of the foo :utyv4s; u ) *gpd6mowmw9;fllowing is true?

  Vanadium and titanium afq5ta2v13 xwee:d:w qre both common metals in aerospace engineering because th1v3dw:w afq:x 2 etqe5ey 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.