Which is NOT a characteristic property of metals resulting h1l5 err 5xtehcm+59 cfrom metallic bonding1h+eme5 x5 l5cctr r9h?

Metallic bonding characterizes t 4n;jh gslho2 ubi8o;8ke/zz *he bonding present in the elemental form of the metals on;k nbu *hh 8g/el2js;i8ozz 4o 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 b+n1 ppck1wyya/kq 9+ by the following statement:

  Which of the following is NOT true of metals? ;see6vpb/i7b1bx 68w mkjt /v

Properties of substances can be related to the type of bonding, includin pprg+p;;xh ujy2z)d-g electrical condu;hpdrj; pxg +2pyuz-)ctivity.
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 strength5l9x1gsq q g7k of metallic bonding?971k gslgq5xq

Titanium, lithium, and potassium have melting pointsb0,a(*rq ep uy 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 i0xwu;g4 k9 o0 pbu4fnrncreasing x 0ukw ur; 4fn4o9bgp0melting points?

  The oxides of two period 3 elements, X . d o 7z(xyl63rqu.c4 zzrq+ivand Y, react in water according to the equationsli. r x.z4o 36quyc+zd 7zvq(r 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 physica: ,jamt z,, br/a+,sc( fdsnlol properties of the following using knowledge of chemical struc,nr:m, zd, s (+ casj,balo/ftture 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 metall1h7 6qj 0+vzcnmx* uofic 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 periodicd3rfx:bfe1yw f 4, -no table. The group 1 metals react with bromine to f-nf,x3:fr1 oef d4byworm 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 are characteristics of transition 9dol1w,f u7sscdzj;7elements?
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 characteristib*4 epb y9b e 8i8zhp2d/7y bjkq76u zd1eoj;vcs of transition metals results in high electrica bqdbdyjk2u p8/ p9e 7 jbe;14ibz78yv hz6e*ol conductivity?

  When comparing Ca to Ni, whic qp+p0oo4 .sr jvg97zoh of the following is true?

  Vanadium and titaniuf8ez7h s .2f1vt +ekknm are both common metals in aerospace engineering because they have af 1nhk 82zk.vtseef7+ 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.