Which is NOT a characteristic property of metals resulting fefy)q/cp- y36movj/ n c:6 vb0lzwx 0urom metallic bonding yvfxzq0olpv wbe 6/nycc0u3m):6- j /?

Metallic bonding characterizes the bonm6-zdrx.k+f3f slp.pding present in the elemental form of the metals on the peri- .l.6fk+dpzm f sr3pxodic 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 /, 5ebabhn: yx s2tgs(7be *pwfollowing statement:

  Which of the following i* ;rx8no.soa :szml-os NOT true of metals?

Properties of substances/nstru rfebu/6;5 qv8 can be related to the type of bonding, including electrical c;rqu6b 5nvef ur/8s/ tonductivity.
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 wu5deon 09m8ts/e o 0osr/qx:metallic bonding o 5n/s9ooq 0eu:8/erx0sm dtw?

Titanium, lithium, and potassium 1t cum9gb +(dfhave 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 correctlas;)f ccz+y5ly orders the elements by increasing ca ;+ylzs)5cf melting points?

  The oxides of two period 3 elements, X and Y, react in wasc2lv-g of o5)ter according to the equations belowsglf52 v ooc)-.
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 thx/gb rs ip9h1e;f w3h1e following using knowledge of chemical spbrw;/x9si f13e 1h hgtructure 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 me6q8xb j7sov eb*ygi ;,tallic 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 periodic table. The gro r+hbgtdj4cwrl1 :0mk2v9ih 7up 1 metals react with bromine to form soluble bromide salts, which all hajd:k74r1b 2cht rmgi 0v +w9lhve 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 7q.)h7ct5cxuxe ua 1helements?
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:0jty, jwno)ywh5(xc transition metals results in high electrical conductiv0(w):c,y jojx yn5th wity?

  When comparing Ca to Ni, which1:,csq q/ibnuna h6xuhcegz+ n3s3. 8t6o;s w of the following is true?

  Vanadium and titanium are both common metals in aerospace engineering because j 6rgq ,pyz1v.they have a high strength to weight ratio1yg zjv, .6pqr.
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.