Which is NOT a characteristic property of metals resultinjcjy5l 16h,burkri z-x x6)jlpp d+91g from metallic bonding?ib)j11 zjlcx6x -9 h +rkply5,drp6 ju

Metallic bonding characterizes the bonding p+qhidhwx-; v.resent in the elemental form of the met;vq.xw id+h -hals 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 bestmt/m vf/n 9ubxcuc1 ,90-hc wb characterized by the following statement:

  Which of the following is NOT tru9vagt8 91u+pk1 g*o7etak mgk e of metals?

Properties of substances can be relatea g.+xch, ow/e(p :6b6psxhye d to the type of bonding, including electricepphyo /, .6hxasx6be c+ gw:(al conductivity.
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 indicates, the strengtla(n6pp8z8 5rq0s h ioh of metallic bonp6ls8ar(5ni8q p0h z oding?

Titanium, lithium, and potassium have melti zop;;fpm+-s ing 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 ordejxv0wm hmw55wo8 f -h0a 7i.2dfs d*qers the elements by increasing melting pow0m7*widmwxf2q .f shh8avjo 5e- 5d0ints?

  The oxides of two peritz:*pgol (a 46f n8xirod 3 elements, X and Y, react in water according to the eqn:oa6(g* r8zx4f pli tuations 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 8 9 w zqsvf4vr59/g)vvv xbgy1d*kmmy13q bf(physical properties of the following using knowledge of chemical structure and b sxqbfym4v/gdw9*1v9 vrm5 y(v1k 8g3 bzqv f)onding:
.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 bond+xz9vzetnwb-35y + 4eri uzn7 ing 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 periodicy k7loji +a mw dbvx.o5(9(4zk table. The group 1 metals react with bromine to form soluble bromide salts, which all have the same lattice s5j .k4k7o9vwyb+mo(lxda(iztructure.
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 characteristics of transit)4d27q **gdxbzdo 6fawwl)mv ion 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 crd h0fh14gqt c) grx7: ycn;lyqfd34. haracteristics of transition metals results in high electrical conductivitc lh41:rrx 0f 4 ydgy q)c.fqhntdg;37y?

  When comparing Ca to Ni, which of the fo2ra5s :2 / p4oxl.d kewszaev0llowing is true?

  Vanadium and titanium are both common metals in aerospace engin **h vyug5woix-u 9(pzeering because they hazho-gu*9yw(* u5p x ivve 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.