Which is NOT a characteristic property of metals resulting /w i,k9n +tsqc)mvc4 ffrom metallic bonding? 9/+4 cqvif,)cktwmns

Metallic bonding characterizes the bonding present in the -ombvg9-7 nr:/uqll2; txywcelemental form of the metals oltg-wovmcy-n/;b729 l xr:qun 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 e cg2)q7ssi4gbest characterized by the following statement:

  Which of the following* ,myr.yd:opejj zw/) gm( +vb is NOT true of metals?

Properties of substances can be related to the vqae29dyc ) itmh )ep0 9*o2jbtype of bonding, including electrical bamtvc9p*h)2e o0q j)y2e i9 dconductivity.
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, thel0gc/)k6s vu ,kc(qoh strength of metallic bhus , k/)g6kcl0(ocqvonding?

Titanium, lithium, and potem9p jd9)bu8m assium 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 correctly or; 3 bs-8fpc,*w1ugmhh (;* tqvxzrx ihders the elements by increasing mel1q-38 rfhgx*w x;vbhcishm;puz (*t, ting points?

  The oxides of two period 3 elements, X and Y, react in water4mala2wp l0ky/y/ik* according to the equation 0m/li4 kaw/ay*2ypk ls 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 physicaz* klpwgsr)+ kuela)818 w9qsl properties of the following using knowledge of chemical structure and bonding:g*wazk e8w1uqs)+)l pk9r s8l
.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 regas*muhjkd tl.+89e1fi :o(l6lwb 7wa wrding 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 grouxo ,(4qt 71zj4g6 kynk0ej ns9dnw0n up 1 of the periodic table. The group 1 metals react with bromine to form soluble bromide tekonw0zx40 sjg 1k dqjy4n9,(u n 7n6salts, 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 tra89 s.emr-rmox nsition 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 characteristicske 7 ckrv-.2bt of transition metals results in high electrical conductivit 2vtek br7-.cky?

  When comparing Ca to Ni, which of the following d7 084,nmfu rhxjbv2abc co4- is true?

  Vanadium and titanium are both common metals in aerospace engineering beca/1pxj,kwox*l 5sc + ckuse they have a high strength to w cj+klk/ ocx*s, 5px1weight 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.