Which is NOT a character0xq+n:dh7f-hkcebp.l a2 eryrg3cjoxa 4717istic property of metals resulting from metallic bondingl.2:b47k0p7erhy1rch caa+ ndq xx j fe 73o-g?

Metallic bonding characterizes the bw e *oox4 s,*h hg81,pp4kb+k+o+she3tzil ffonding present in the elemental form of the metals on th g3, esk8+1ho +sblwtx4z4fohep*i +f*p o,khe 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 bes.*qgif ,uc +bnm75 acht characterized by the following statement:

  Which of the following is NOT /ss(qll7/z 5zw 7,krs j/mx kktrue of metals?

Properties of substances can be related to the type of bonding, inclu:6ydgq;n jsn(1sod. 0avm(du ding electrical conductivu:ma d0;go d(v(d y61 njsqs.nity.
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 2a a uo.r2jet4xeoe*4 corresponds to, or indicates, the strength of metallic bondingeeto*aeuo4 j4 .2 2xar?

Titanium, lithium, and1o l)gu4lms+ q potassium 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 corl*l *mws0rj8hv ye2*c*)mbc u rectly orders the elements by increasing ms*l c*w)j*er2v*byl8h0 m uc melting points?

  The oxides of two period 3 elements, X and Y, react in water a 81a:mjfc :0 bxn5rakuccording to the eqrjb180 aa5xk:fcnu :muations 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 4dc (ox/qh6 kk)-uczkproperties of the following using knowledge of chemical structure and b4zdx6()-/khkckq uo conding:
.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 regardkwq:;g p:e3ag 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 g *ygrj3zgf y(9su9tlzmv(4 jpt d9r(00up* g kroup 1 of the periodic table. The group 1 metals react with bromine tr0vdpu30(9 z z* 9 9g ls(ftp*tkjrygymjg u4(o 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 followingz;zxc dse;/o5v3rmec 1. o7ux 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 metals results iz.4v ix qp8a2fn high elec4v2 q8xfp.iaztrical conductivity?

  When comparing Ca to Ni, w7/k fmzylma9(gibi 6rxb ) v.0hich of the following is true?

  Vanadium and titanium are both common metals in aerospace engineering because efd f4,i nm:55ik,purthey have ,i4 dn:5upf5kf ,emir 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.