Which is NOT a characteristic property of metals resulting from metanspqg bocs1/ a* l8l+,llic bonding+s *sp,nqg/1 lco8la b?

Metallic bonding characterizes the bonding present put o0:kv hazbq9dj4:;g rd72 tm(4yein the elemental form of the metals on the periodic t;4vzybmtprjh:0dt ge9 (u4a :2d qok7able.
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 by thdp7ix5/ vut +b7js n1ie following statement:

  Which of the following is- **u: it1cjovt (sf7g2 3kabzgkmvi/ NOT true of metals?

Properties of substances 6yh7b :hnw **;yfqwd fe8nfx/ can be related to the type of bonding, including electrical conductiv fdbfneh:w*fxq y;67 h n*8w/yity.
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, o 0f/d)t i-uvlvr indicates, the strength of metallic bofdvvu -/ l0i)tnding?

Titanium, lithium, and potassiumz-mvmhrala 2 .7yw3 f) 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 orders the elewi5 eg w:wy bmlzw4ya;r)6 e 0sd8md70ments by increasing melting m;wz70wyee5:yd) i 4sw0wg68rmbal d points?

  The oxides of two period 3 elements, X and Y, react in waj6n:.a 6xhwb8q4fcf)r k/ qf 1jn5qryter according to the equationn cf/qqx)y f .j5n6b6f: r hwjrq8a4k1s 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 physicalr*z (uf9u w(fg properties of the following using knowledge of chemical strucfgufr*(z w9u (ture 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 bondzr -n,-gtffm 2a -3kmoing 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 the syb mj5q1 4m c43e,; enb1pylvperiodic table. The group 1 metals react with bromine to form soluble bromide salts, which all have the same l;4clep yb sn1ev qj 3,54ybm1mattice 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 a 35whddge win zjc/ bi)i 41*tgwc6.y+re characteristics 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 o:obq j(-3hd9sl nri8z f transition metals results in high electrical condbhr j zn(lq 98od-s:i3uctivity?

  When comparing Ca to 4m e7q 5op*sr8.oagr gNi, which of the following is true?

  Vanadium and titanium are both common met+1/oi*sn rt ( en+lmptals in aerospace engineering because they have a high strengt +n n+(1ltm ep*iors/th 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.