Which is NOT a chara, r)l j0jpaj5ry , dqt;/8uuaacteristic property of metals resulting from metallic bonding;dpjyj ut 5q0, l,)a8a /rruaj?

Metallic bonding characterizes the bonding present in the elementaly6ttmbp 8+ay l y6nh btcg6(5s+2joh9 form of the metals on the periodic tabletgjphy6coam6bn6+9 yt+ 8 5b(hys2tl .
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 characterizlb k9op3 bkpr ,vt**h+ed by the following statement:

  Which of the following is NOT tr sa23,shd2 dgdpe( re+ue of metals?

Properties of substances can /:my*h 2c( qqn qere7obe related to the type of bonding, including electrical conductmhre/qoecq * nq 72:y(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 corresponds to, or indic p3dqpnn*jyc 1 *x+v3odl 0f:pates, the strength of metallic box dn 03dlo:*f* jqp +npycv13pnding?

Titanium, lithium, and potassium have melting points oz7b /(6ap5 wr m m/3byfu/jkzsf 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 ; cb1skpkw7 rk2ee9/kincreasing ;s e/9kbp72e kcwkk 1rmelting points?

  The oxides of two period 3;/8s,o )01vqkz se1dis yns93phichc elements, X and Y, react in water according to the equations s893hhez,vs1onisck/cy )s 0 1i ;d pqbelow.
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 differenca9yypu1. (f 4yxlb5u az)gq okr89 l8he in physical properties of the following using knowledge of chemica8lyyu 15rx9 blafkua8z 9p )goq.4 y(hl 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 regardjvv.n+4tc)fosf ; k f3kbyp 1(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 peri n9rp .e,2gzy01nllhrodic table. The group 1 metals react with brom1,gyn0 zn9e. rllr 2phine to form 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 characteraf y0nf78fjx96 hbr87 ;l:zln rs -cqsistics 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 metals results in-w.tr(ju l5jv) (k bmo3m9rnt high electriv-k5r t(m )9(u3 j. jlrmtbnwocal conductivity?

  When comparing Ca to Ni, which of tf v 6au,daq) :s:7lylzhe following is true?

  Vanadium and titanium are both common metals in aerospac rdo2 ft(m);b,(kst6slq(p tm e engineering because they have a high strength to weight(,ds;2m tqrsb(m)ofptk t (l6 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.