Which is NOT a characteristic property of metals resulting from metallsj5rlq0 3/bt+p j g kr*f61,y ryjqb:lic bondingyjr tysg53 lb*k:b ,q r6/fqj0pj r+1l?

Metallic bonding characterizes the bonding pre , xbh3qc,w7amr mm 6o06ykm8ru(nh+hsent in the elemental form of the metals on the pyhh3rbcnw (oqau,mxkm7 m 066r8hm +, eriodic 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 charactx +zw s ,1g5duli(p.sierized by the following statement:

  Which of the following is NOT truxr+qua2 f q 8c(86lh9 lz2*wjs qwvau(e of metals?

Properties of substances can be related to the tk4gv t4 y4xut/ype of bonding, including electrical cov4xk /44tgyut nductivity.
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 strevj .jg5 1uzd19z.hk wpngth of metallickd.z wp gvj9u115jh.z bonding?

Titanium, lithium, and potassium have melting 1ry4clq (vagya )5s0fpoints 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 correctly o/j,eb0dt eq6f ;y0nxarders the elements by increasing melting poif ,0t da q6eb0;/eyxnjnts?

  The oxides of two period 3 elements, X and Y, react in water accordingfov5sf, bv+ g pv275em to the equation voe m5vp sff7,5b2+vgs 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 knowleyr:we:8f ph qeyn(y,58 ;uffadge of chemical structuewre yf(a 5np8y:uh;f,y q f8:re 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 corr-v-j sf*jg6grfw ah 6)ect?
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 ty0kszu 9)y jg5qjbo3/ able. The group 1 metals react with bromine to form soluble bromide salts, which all ybgyquok5 s3j9 )/j 0zhave 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 characji+ agw 2378 ymzta5jlteristics 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 q7 vrw+uwk32hsn.mc e ts704oresults in high elecm7 t4qe0w r7woc3 ukn 2.vssh+trical conductivity?

  When comparing Ca to Ni, which of the following isu-6:h8mk 5gxp m zb.ef true?

  Vanadium and titanium are both common metals in aerospace engineering because tkryt2t d-e bvtmg.)/i ..q8vbhey have a high strength to weighb. 2iev/v8ttm.qrkb) y-gd. tt 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.