Which is NOT a characteristic property of metals resulting from metallic bondiiu.l(io /i z kj77eow8ng?j i7luoie/k(zw.o 87i

Metallic bonding characterizes the bonding present in the elemen 1 :ew livrduieumogfg5p ,/7i.1p 2)ntal form of the metals on.5 u g :l,eiuier2p1wmnd /p7o fv1ig) 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 characterized qh t d0 m)k1s6v(2 ff-mtdgu1yby the following statement:

  Which of the following is NOT true ofe.c+hi:hei,p o 9c6 i7giq m3w metals?

Properties of substances can be related to thezsbkku3d qz 0-3e(a f4 type of bonding, including electrical cozd 0b fz3ask-k ue43q(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 tp xm5 t4cgefyrh30o12: .zygbo, or indicates, the strength of metallic bondi4gr.2 tb x0:53ymy fchgzop1 eng?

Titanium, lithium, and potassium have melting pointpmhahuj /e7k.27tox 5s 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, w6uo6 /q7s2r pqugot0can j8 uv6gu,.qhich series correctly orders the elements by increasing melting poiogru2q0n qouusq7ju g. at66vp c8/6, nts?

  The oxides of two period 3 elements, X and Y, react in water according to thii/dweh +h.a7m k-b,4dmr0l we eq.+h4d/m7dei w-mhi0k ar wb ,luations 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 knowled r2aj2 +b3kexuge of chemical structure ax2r23k+ eabjund 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 bc4sfn r-u u5+tonding 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 th ;f n *-iwt3ci9uv,*m zxw2pnoe periodic table. The group 1 metals react with bromine to form soluble bromide salts, which x tz;*9f,*3uvnipw ci2wn o m-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 o 5bty, qny*,tvf 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 followinwe+a(( d3gof lg characteristics of transition metals results in high electrical conductivity? (o(fg 3a+ldew

  When comparing Ca to Ni,n iiym,,h* ejxap, ,wnaqc7sfw3 8t1( which of the following is true?

  Vanadium and titanium are both common metals in aerospace engineering b c/g od//dn;j(. uejzmkt* 0ziecause they have a high streudg*ek nj/ mcd (zt.i//o jz;0ngth 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.