Which is NOT a characteristic property of metals resulting from metallic bonb9 j,ry.vw4 jqlb3u )bq5 ppo3ding?4vj 3ubb jpyo59,.b)rq 3wpql

Metallic bonding charact9og/ kisz9ne .erizes the bonding present in the elemental form of the metals on the periodic nis9o /z.g9 ektable.
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 follox(8)jsy m0b3x/xw a zvd: vb-owing statement:

  Which of the following is NOT true4r-ojl(7wvo(f ja n 2r of metals?

Properties of substances can be related to the type of bonding, including e;nl 2yx;,az 8wg ;bzl eryp*3jlectrical conductivit 3xpy8 wzj; r2e;nalzylb;,* gy.
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 corresponds6r05 ra+u w zgxnkq3/v to, or indicates, the strength of metallic bon v r/n3rzga+6ux5kq 0wding?

Titanium, lithium, and potassium have mo;d xmna1 efbw3 f/x*l 9tywg buap8i+606hz;elting 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 trend6i o/fhma(1ms s, which series correctly orders the elements by increasing melting points?hfmom( /s 61ia

  The oxides of two period 3 elements, X andg9 d8jbz/qw e/ci:;uf Y, react in water according to the equat cjegizd//9w8f ub;: qions 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 5r2l 4jq *by2x7zjn hy4dcy2g following using knowledge h4 qrxl2yzy4j72c * 5yj ndgb2of chemical 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 regarding metallic bondinmkhd ;s: jn z;lfc32 eoxp2+0ng 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 periodeuk i7pw;rx2that* a3 *:xb 3sic table. The group 1 metals react with bromine to form soluble bromide salts, whi3b t k7r:txh ae*ixpu3sa;*2wch 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 characteristics of t*588uxod4q6rwcsrt30l 8 hqvd(a ukq+ y/jmy ransition 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 tj70di-lyc: s t6ryxa5+g;e dzuw7w5f ransition metals results in high electri75;+y7gjay tr5fcid0 ux: w sewd6-zlcal conductivity?

  When comparing Ca to Ni, which of the following is dp5k5 :cw7:sld la;x.m c8g ictrue?

  Vanadium and titanium are bo1 fzbn8ue f9/rth common metals in aerospace engineering because they hzu/e n89f bfr1ave 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.