Which is NOT a characteristic property of metals resulting from 9fnvr15 z+ zkumetallic bonding?v ru+zn z1k5f9

Metallic bonding characterizes the bonding present in the elemental form of * 1a-cqvvfc (hm -: fl0afu0yxthe metals on the periodic tm(aah* 0 0u:y- ffc1vxfq l-vcable.
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 statew-mftcu6fohl954p ao /s:-ci ment:

  Which of the following is NOT true ooi/ k (gn(zb:o3jhkw, f metals?

Properties of substancesjb-rabd8/ ffjidch*4u w +s97 can be related to the type of bonding, including electrical conductivi/uj*sfcdd aw48+h bri7 9fb-jty.
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 strength of me3tkt s cu3z;d+tallic bonding?kzc+st 3 d3tu;

Titanium, lithium, and potassiuj.9uct)lblkj.: 7n t+h1w h2qnhyl9z m 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 th8 p1 en0pfj sb)oe n:w-n,/cije elements by increasing melting pointf-)1io8 c js0bj/eepnw n:pn,s?

  The oxides of two period 3 elements, X and Y, react in-8wdkg:z3x5 zdmlm)93ci np v g gfw52 water according to the equations bd vxg-npmg3m2lf):5wkd g3wzz 9ic5 8elow.
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 differtlh*,,mv5xd s.03rz iz2uqhh ence in physical properties of the following using knowledge of chemical str ,h ,vl rhziuxmz.520hs3qtd*ucture 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 regara* )j:rfr7nl3)hk. - mokwdp rding 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 (rtz3jb;ls (vr3nncd: i t5s16b)acv,8tjroperiodic table. The group 1 metals react with bromine to form soluble bromide salts, which all have the same lattice structure.r85( (nirl,n;c3:o1ss)3az jtbdj cvtrv b t6
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 a1afp oo 9tio-:re 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 following characteristics of transition metals results in high elecypinp*nv9 z* rac;78btrical conductivn9n pc*vrypa;z* bi87 ity?

  When comparing Ca to Ni, which of the followin dko 6laoix540g is true?

  Vanadium and titanium are both common metals in aerospace e.a :xb9km2v oo:+ 9lfv. f9dgrfdye4 bngineering because they have a high st:rdb fb: o2gdof+v.xf49k ev9 . m9aylrength 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.