Which is NOT a characteristic 3:aubdb,vyo g*i2hz/property of metals resulting from metallic bonding?3 yboviau,hz*: 2b dg/

Metallic bonding characterizes the bonding present in the elemental ftsn6gb3j e+): (i pmsaorm of the metals on the periodic table+b n: mea3tg)spji6s( .
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 characterized6di.f/i h kea/zy5m6 g)f a9rd by the following statement:

  Which of the following is NOT true of me ,-; xwsyf +(kb8z kbn-8x5; zeehvjfdtals?

Properties of substances can be related to /pcfa 6zqg9*5oqxou6 the type of bonding, including electricaz6* foqg/ 6qc5xpa 9oul conductivity.
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 indi6wji ol 26ern1cates, the strength of metallic bondine6jl6 io 2nr1wg?

Titanium, lithium, and r1g 9h rom +fm71nl6orpotassium 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 ser*ya cu(a v7s 7lt8gm2mies correctly orders the elements by increasing melting points?v8* aumya7(2ml t7cgs

  The oxides of two period 3 elements, X and Y, react in water accorz zbed) i;.9ituhd+6 rding to the equations belowiu;d 9+b)zz h6ei.rdt.
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 knowledvoe:-kr5 r x-rxkw,(yge of chemical structure and bonk v(-x:,r r5owexry-k ding:
.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 corrpr.)fw,r ) tyhyq)q*iect?
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 table. The groul qdrp.6c/ ca9p 1 metals react with bromine to form soluble bromlrd/c69 c q.apide 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 transitiopo mqs1wtknb08 3gld3 :( 5irgn 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 followie:z d rxoprz:,*c; )fvng characteristics of transition metals results in high electrical conduct,ef*:ror p;cd)x zv :zivity?

  When comparing Ca tod fbt9bbp; u25 Ni, which of the following is true?

  Vanadium and titanium are both common metals in aerospace engineeriniajx:ysmm* xf3j40k ) g because they have a high strengtf:k4j)my i03m x *saxjh 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.