Which is NOT a characteristic property of metals resulting from metallic bondvgx7b*d88u;1eqzo.jvom. oirra3 5 xing31mz8x do*voji87 r.xa.;o v beg5q ru?

Metallic bonding characterizes the bonding present in the elemental forqt z6q-mr0*i e.l* yrv 9rnvt,m of the metals o6,i r lz.yv-er n9mqtr*vq*0 tn 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 c 6ew on v-g94xfle9l x3jzo;)3gd vif/haracterized by the following statement:

  Which of the following g 4gtb;am b0viqd:b(. is NOT true of metals?

Properties of substances can be related to the type of b c +-shbh dl-mv7yh0l1() dntbonding, including electrical conductivity. tb)-hhcmy7vhdsdb0n + 1ll-(
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 indicates, the strength of ss8dl:06 +v0 yy wadxhmetallic bond 86+sdhal:sxyvydw 00ing?

Titanium, lithium, and potassaw.uzm wejv:b4c* u; 9ium 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 se zteh1/50gez dries correctly orders the elements by increasing e/0 1hztzed5gmelting points?

  The oxides of two period 3 elemend2 zx umwc,g:jom4 /1cts, X and Y, react in water according to the equ c4mm2o,1u /cz jw:xgdations 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 prope8gs4s p;wh p:urties of the following using knowledge of chemical structure4gs swpp8;h: u 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 bonding are corp9yqb/lgy,yvhthl xq.00 xb6k9 a2 g2rect?
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 periodictlhmgv jry.28yo /g4 l:nk85ivr77 7dm d9 abh table. The group 1 metals react with bromine to form soluble bromide7h5v2lo8h 4l 7gr k9b v/iyjradmdm.8:y7nt g 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 characteristics of transition elemwgm 6ghd5h(0s:qr 7gn ents?
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 characteri4 a psfw;sfgj ;t02v4; hwpa9bstics of transition metals results in high electrical cond;pf 0sgj;b w 4f p4astv;wah29uctivity?

  When comparing Ca to Ni, which of the followm 8 fg1zw5tc)0 ai jlmwd5 .ufgs+qi,h1:ci6ying is true?

  Vanadium and titanium are both common metals in aerospace engineering becb2whcy56rg wz+.u w,l ause they have a high strength ty2z6r5huc gbl ww.,+w o 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.