Which is NOT a characteristic property of metals resulting from meta:5f2clr prw( n3uh7ia llic bonding:p3 lh nu2ic5 fw7ar(r?

Metallic bonding characterizes the bonding present in the elementa*rfd* ;hu ,0+ *wntfyyodyu b4l form of the +y;* ud,hy*0b rodf4 u yfn*wtmetals 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 kxs*7d u(/ggkrik a+ ,following statement:

  Which of the following is NOT true of ss8k n)2fu 0pkmetals?

Properties of substances can be related to the type of bonding, includingi4i hg+etl-d,41;yx i;znk sq;+vf xy electrical c,x-xi1g niq4vz hste4;d +; li; k+fyyonductivity.
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 mmauhhip7g4:w/h4lgds5 (-x best corresponds to, or indicates, the strength of metallic bmhlh(p:a ds/xi 4 hg4w5g7mu-onding?

Titanium, lithium, and potaf0n 6 :5hudgv v; 7/wlmbktjb9ssium 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 orders the elements by inc-z8el;av: m wx. tou/dreasing melting poi.d8a elmx/v:z-w ou;tnts?

  The oxides of two period 3 elements, X and Y, react in watt)rke i8+ru ko8 c h2y+phm8 nanc3+/her according to the equation3nc8k+eac 8 )yhton+piu2 8 hr/mr+ hks 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 physical properties of the following usiby 5ajzdz:47u ng knowledge of chemical structure 5 4 d7zua:yzjband 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 regarding metallic bonding aretjks6+neu/ 4r 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 xrktch5c9 ikdu uiq( wn7: 6.;table. The group 1 metals react with bromine to form soluble bromide salts, which all have the same lattice structu9(75hiqd kc;k6ti ruc nw .x:ure.
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 transition qa1(g, lvnk cp/h;:hn 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 ofuo,6l4k r6 zyfa6wu, m transition metals results in high electrical conducti,zkm6 a6 r4,ylfwo6uuvity?

  When comparing Ca to Ni, whpf30 id/lu;6nb2x,q7a k0oqdg zlq0oich of the following is true?

  Vanadium and titanium are both common metals in aerospace edc. l slo5;yy1ngineering because they have a high str1lcs. 5; ldoyyength 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.