Which is NOT a characteristic property of metals resulting from metallic boknxaq*o20eg/ nding2*0eon/g aqkx?

Metallic bonding characterizes the bonding present in the elemental form of gf o3j srz1xtw) 3-zjvkn6+i* the metals o3 j+3w6ti )zngjvkxszr 1-*f on 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 the y)s)rgvpq 0 xcp3eqb0s54cl yd+nv;5 following statement:

  Which of the following is NOT true of metals?l uzwl kr+on31cysfbm 997;hz k( qp0:

Properties of substances can be related to the type of bonding, includinmvq4shr 6f4e:n v )s-dg electrical conducts 44f6mrev)-:hdqn vs ivity.
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 corresbh(phghn6 (cmqz 0g,(ponds to, or indicates, the strength of metallic bh,6pcgz( n qb0(h(mghonding?

Titanium, lithium, and potassium have melting px; t81 rwjo2u 96hfokkoints 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 incru f);s3n6yofiddc+f:. t6a eweasing melting pd f;otf 6 c3sa)i+.f6dwyeu:noints?

  The oxides of two period 3 elef efwc+q4 cz*-ments, X and Y, react in water according to the eqf q-cz w*4+efcuations 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+nq,0a0oxpfqw5 + gj c properties of the following using knowledge of chemica5+0fn aoxg w+,qqpj0cl structure 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 metallic bon+l1,-ecs xpu oding 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 theyefz q)7md 13qp,9h ki periodic table. The group 1 metals react with bromine to form soluble bromide salts, which all have th p,i qhydmqf17k e)39ze 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 charactzsg -ytn:9t x;eristics 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 t. je;m z(m9 onmeeya(swf g9:pasb5+l2 ,hm4zransition metals results in high electri 9+semm(ghy9;.5,zb:fz (e nsljwpo2m me4a acal conductivity?

  When comparing Ca to Ni, whichg ;qc2mo*ua/s of the following is true?

  Vanadium and titanium are both common metals a2u:omynlm a0y3,,) lhzbm1g in aerospace engineering because they have a high strength to wzm0lomau han:, 3)yb yg2,ml1 eight 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.