Which is NOT a characteristic property of metals resulting from me-hu v(3kktp 2 ;zlngln4ou+jib do-/(tallic bonding-b3 2uhg ip/;lnou-((ld4vo+tk z jkn?

Metallic bonding characterizes the bondin:y0bx qsvvc6 8y( q:jrg present in the elemental form of the metals on the periodic table. :0vcr sy(yxq8:6 jvbq
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 bq(kggr7i4w q.*r0 h 8omldrpsl11k0y est characterized by the following statement:

  Which of the following is NOT true of metals?9zteprq5 /ve rpdx-; )

Properties of substances can be related to the type of bonding, inc t zqhc uqe935b7h-i7 k5qw*in*l(sqdluding electrical conid**(qkq5qeib- snwt7u 5z9h hc37qlductivity.
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 zre 9v,gb1 7rk(,dydeeg- gp 7n8oc3l corresponds to, or indicates, the strength of metallic bond y7ebz( odv,ecl k,8 -rp9g13rengdg7ing?

Titanium, lithium, and pool*,j+z m7 paf.z zb*b:nmtg1 tassium 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 the elements bypg g4 340it/pirfia bs0dt.) n increasing melting points gri30t/ bf4n.ip)isp0ga 4dt?

  The oxides of two period 3 elements, X and Y:p )yu-h6zfyrx v7jgm)x2zw* , react in water according to the equa pzgmxu* j6: ryf)7)hy 2-vxzwtions 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 phys5iugn+cc 5q7y ical properties of the following using knowledge of chemical structure and qgyu7i5 n5cc+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 metalh2gn6v:e; cyr: ku(ka; qytkl-cr2.rlic 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 group 1 l.0 ng3ta d, )q*ns ss.wqmxp/metals react with bromine to form /3 wp dtgxmaln*s.qs,snq)0 .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 transit0fz.dq qa l l:cyp..awjsw:3 zr10 1hmvn3t 4sion 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 characte bf,(bid tz *qwm-j0*w*6e mmeristics of transition metals results in high electrical conductivitm*w(, -*di0bm m wee6zjfq*bty?

  When comparing Ca to Ni, which of the following is true? (9shgor:.veu,u8e3,q ygs ie

  Vanadium and titanium are both common metals in aer3t-.5je3mpocr 8zihjsw3fz 6 ospace engineering because they have a high strength to wthzfi 6zc- rp 3 j35m3o8ews.jeight 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.