Which is NOT a characteristic property of metals resulting flf4n1me;j5 sqpsr w0*rom metallic bonding?e nqm*0 rlsp4wj5fs 1;

Metallic bonding characterpre;lvisu7i c tw ,10,izes the bonding present in the elemental form of the metals on the i01 crs,, ;7pelw tivuperiodic 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 characterizedyos.l 4x 4goo/ggw0fw9t5/6 k3rks o e by the following statement:

  Which of the following is N14k1q 1e v+0b xw joe tkdg1 e9pnhxo;x*urx;.OT true of metals?

Properties of substances can be related to thekf5g vfub 5.c+ type of bonding, including electrikuf5 5vfb c.g+cal 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 t6cdmc i5t(l z:m:+j zjo, or indicates, the strength of metallic bonding?+mctcj6m(z 5:i zlj :d

Titanium, lithium, and pze,il:t 2: gxnotassium 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 correcpnj 6hhw60ez47izkd0m; cl0u tly orders the elements by increasing mej di 6ukh7wz0elpz4hc0 6nm;0lting points?

  The oxides of two period 3 elements, X and Y, react 5-gpf g6fhmsy ,*lx m/in water according to the equations belg6, p -ff5xg h*ymsl/mow.
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 using knowlmoz c;kvj9b s:qeaad ,.)x*/ pedge of chemical dc/) s qvpb9ja.za,xo km; *:estructure 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 bonding are correcm u-f(0rar.gg t?
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 tabxi0k : of.drhkh3./uf le. The group 1 metals react with bromine to forfx./kk:f hi ou h.3d0rm soluble bromide salts, which 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 arzdtcg3d55y(j tok4f b m/:1lke 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 followingoc,3a61auwzsz(k f )v ouce2* characteristics of transition metals results in high elec, )cwc31z 2fa6 ao(u*skozveutrical conductivity?

  When comparing Ca to zqu49i ijm. b;kmmr;pf3h a0e7usp; ) Ni, which of the following is true?

  Vanadium and titanium are both common metals in aphc; . nmpo2:gb2wkzi91mld+ db74 uqerospace engineering because they have a high strength to weightmkd bi 1gl;cm9podh7uq2b4. 2pnz+ w : 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.