Which is NOT a characteristic properto;ff/+o0bp7 7f tfuwry of metals resulting from metallic bonding?ru;/ow t7fo+f fbf7 0p

Metallic bonding characterizes the bonding present in the el y z6wc-rc5)pof1 ctck,9:mhd emental form of the metals onz5c19hpdfcr:t 6mc, owy k- )c 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 by t5y4 1hr:rxj gthe following statement:

  Which of the following is NOT8/w wvwxw08eu true of metals?

Properties of substances can be related to the type of bonding, including elect34,mopty0ep/w3e gfg ricafg4t ,p w0ym3/gpoee3l 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 to, or indi1j gc; ,zbzd4fyi+n m+v6a z-qcates, the strength of metallic bonding?1z dy+ +anf mq 46z,v;jzbicg-

Titanium, lithium, and potassium kp 2irsofxg;-8ev24b 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 ord qmie6fb6p1 (ders the elements by increasing melting pb i1qp(de mf66oints?

  The oxides of two period 3 elements, X and Y, react in water according to the 7f jjrxdf(k*)f8rs qyo 6a7 j3equations yxskrf3*d(fq afjo7r67 jj8)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 pr+1.arr l4c wsjoperties of the following using knowledge of chemical structure and bondir+.1 sj4 cawrlng:
.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 regards,lhz yroog99xy* *j(ing 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 periodic tabled.k1c( nbatij:0tz; t. The group 1 metals react with bromine to form solubltb ;.ik0zj( d:t1cntae 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 transint d5o/r5 / d*v.xjxc:h3 (ltzke/ aostion 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 transitio1 au cgidgo96wv15 ,w2bek u9en metals results in high electrici16 2uwcbe9, gud5we9 g1akoval conductivity?

  When comparing Ca to Ni a-v,kn c63e,bw*fsuk, which of the following is true?

  Vanadium and titanium are both commo yv5;t-h09at64sglhql.5 ozc0 gtkfkn metals in aerospace engineering because they have a high strengt0.-gv;s kt 5h 96yzckf l4lhat tg0oq5h 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.