Which is NOT a characteristic property of m u 7g aj/.lw9, r6pl65j)q vkvnf2zcyeetals resulting from metallic bondingul)z.e k6 9jj/rycnv7f56gv paqlw2 ,?

Metallic bonding characterizes the bon5p2zr)k hkby xp7 b;:oding present in the elemental form of the metalsp:b2r ;kxy75bkzh op) 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 following statp;y cf+4lbl+rement:

  Which of the following is NOT true o(()pz(wi n)ghjrx )ebf metals?

Properties of substancut2+kceomfj d/wz /ccfj(y5 *3t-9d2ny8yog es can be related to the type of bonding, including electrical conductiviywt dyo/jcct * 5(jfyouz eg2 2+m9-/8c fnk3dty.
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 indw+0b;vts i76jiit m 6jicates, the strength of metallic bondinjs6ii7t ;6+ vwtm bi0jg?

Titanium, lithium, and potassium have melting points ofkqlt6a s95hzyq b-((g 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 inhfhnj(:8ym- o creasing melf(om n:h8yj h-ting points?

  The oxides of two period 3 elements, X and Y, react in water accordi pvran 93vt2f6ng to the equations below.39a tfvrv2p6 n
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 properti:xvmt 1s.* ln,naa4qp es of the following using knowledge of chemical structure and bonding. a: qplsm 1atn*x4,vn:
.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 mo3aoua 8r4.u jap7m v;etallic 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 grofjoz:s.a 4+k: lj3eyh0 wqm+ uup 1 of the periodic table. The group 1 metals react with bromine to form soluble bromide sa.j y k:4sm3 +ha0ol:jeu+fzqw lts, 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 followinh4c-ick fjtot+o k s1- z7*l+mg are characteristics 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 transition metalebwqoil (ci522ue4f4 s results in high electrical conduof b2euwi(icel54q42 ctivity?

  When comparing Ca to h46au obwdtjy(9s* bcd./mu-i;g;cq lhl .-pNi, which of the following is true?

  Vanadium and titanium are both c4 (iiqsdux) :a:df th)ommon metals in aerospace engineering because they sxt)iqh(4fu: i d: d)ahave a 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.