Which is NOT a characteristic property of metals resuluxo/nmp:*zc8s c) o/ wting from metallic bondingw)/sc8o *nuop/ :x mzc?

Metallic bonding characterizes the bowg96um;3oama;r k 8vynding present in the elemental form of the metals oomru m; g9y3a ;6k8wvan 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 (rq+z(jgx p;g characterized by the following statement:

  Which of the following is uyjnye 2lxj hk;d r1*h+3;o3vNOT true of metals?

Properties of substances can be relljwx8 s -i8k7aated to the type of bonding, including electrical cols 87wa -8jikxnductivity.
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 corresp-b-n pi,b/gi5bve if- onds to, or indicates, the strength of metallic bon v5--ibgn-ebi bfi ,p/ding?

Titanium, lithium, and potassium have meltn r9c6ytjy;bw(wusd*yl)xs: an42zx6 u* r a6ing 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 : /8nbuat+aa xcorrectly orders the elements by increasingaa u:8xnt/a b+ melting points?

  The oxides of two period 3 elements, X and Y, react in water according t*rmta p s.2 mfqe)+;tyg1lw v8o the equati v m*e;s+8at.f1wlpmrqt )2 ygons 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 w,k*u( gbc)x;vnxre 1x5/stqn )3cabin physical properties of the following using knowledge of chemical structure and brc satbxe ,)3vk 1nx(* ;cnu5/)xbgw qonding:
.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 bond*looo:000yqm 1ebxcikg 4k +ning 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 1u mm 73600kntzkt /gfjiff1w6 of the periodic table. The group 1 metals react with bromitzffkgtw6fju7 in0mkm31 6/0 ne to form soluble bromide 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 elements imh/ mqd 1,f3gy f*9pyfac+u/?
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 charactq1ga 2215.kripeadc3*vz h bi eristics of transition metals results in high electr1cdae .1rv3ia *2g h25qib pzkical conductivity?

  When comparing Ca to Ni, which of the f-qp7v (z d3x lu+mtgctsijs/;.t;.;pd p0eoh ollowing is true?

  Vanadium and titanium are both common ko;g9w emwa boey c2 ,o8nm8egn 9:33nmetals in aerospace engineering because they have a high strength to w8 c3 a n82no9n3;mgmeww b,oko9eg:yeeight 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.