Which is NOT a characteristic prop24m)msp bh/iierty of metals resulting from metallic bonding)p /2mi4b sihm?

Metallic bonding characterizes theq 0g;o rq9h .bgxyqc j3a-7ri3b5 b/mz bonding present in the elemental form of the 7oq.q0/rg5hb;j g ribqc3a9 - x3 bzmymetals 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 cwo ;;, i 2cqhgpi9f*k)upou1aharacterized by the following statement:

  Which of the following is NOT true *mixv0 v c3 d5lb61whga1 (qwcj2pn)xof metals?

Properties of substances canl(r0ook+xq, z) z+jl 8bqs7is be related to the type of bonding, including electrical conductivitx z+lo(bki+ 7)qlqs0 sr oj8z,y.
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 correspond.sxetibl*b ckd r/-g4x(7 ee0s to, or indicates, the strength of metallic bond /gre(b0ee7i.x 4 x-lksbdct *ing?

Titanium, lithium, and potassium have melti10 5zhp mg-lfwng 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 correctlnmzz10t0)brf83(dldyy 6eq jy orders the elements by increasing melting points?jf8t mydn3 (z06ldqr1 ez 0yb)

  The oxides of two period 3 elemws0k :u:1o8 z mxqr,k1sgtcg2ents, X and Y, react in water according to the equatiou x w :8qrgo,smk0zk 1:stgc21ns 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 properties of the following using knowledr,fnpyg+*wp4i hi a( 5ge of chemical structure and bonding: +i4rih ay*5ppf,n(g w
.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 ve m7 gv8*t:7 5g/ k m4gjnob/brrag,ametallic 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 metals rp ttl*6hwbxo c,09ae8eact with bromine to form soluble bromide salts, w t6h*8ba cw 09ep,olxthich 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 characteristicsz7cdwuv o- 11q 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 followin8*46s 9hpf:nns oxhfd g characteristics of transition metals results in high electricalx9hdof6s 4sn*hn: pf 8 conductivity?

  When comparing Ca to Ni, which of the follow,rbvhp 7/r /ico5cj u3geq74 xing is true?

  Vanadium and titanium are both com*u 2sr9* )uz7smpdz gcmon metals in aerospace engineering because they have a high strength togc 2szsu*dz r9*)m7p u 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.