Which is NOT a characteristic property of metals resulting from metallic bonding-i,-yafv 1l ja1v i-l-ja,yf a?

Metallic bonding characterizes the bonding present in the elemental form of thjq om-;d-vyi p :r/2n) gzu*bme metals on the periodic tabuo v2*r zy q) gmjbipn:--m/d;le.
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(dmftrf/exs yc/q ) :c(2la8k by the following statement:

  Which of the following is NOT trun s( n6jjiqj/g q,at9/e of metals?

Properties of substances can be related /u(bpi e0v wx oz2js88to the type of bonding, including electri8/0wpu28 xvzoijs(e bcal 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,re hnbx:4) j9c or indicates, the strength of metallic bondinc x:nhj9rb)e 4g?

Titanium, lithium, and potassium have melting pointscw45 zwbent *9*w+ jci 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 ex :y hckj(f*).i ;2ins/7thjgmnc tq5 lements by increasing 5(hy:ttc;gqsijm*/2 k)ji7 .chn n fxmelting points?

  The oxides of two period 3 elements, X and Y, react in wat* /uxiyg/ -gurwe2zkt3 ;d7we h(j1jner according to the equations belyg* ;27 eu-rdk (3wjh/nwue /xgj tz1iow.
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 th f1.49ch6 agw b0dzcyve following using knowledge of chemical structure c zhvyb1aw6gd 94cf. 0and 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 tde7*owu9 ct zig fck v+t7.(5metallic 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 group 1 of the period:exi:bsug- -pic table. The group 1 metals react with bromine to form soluble bromide salts, which all have the same lattice structupgx-:-ub:eis re.
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 elemeno9r*tvdcl 406pbpj f4 ts?
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 of transit f;hvpw, 7yc-tion metals results in high electrical conductivihwft, v;y7-cp ty?

  When comparing Ca to Ni, which of the following is truekpnk -fl4tr au(:+2-(zrolxl*j ; u uh?

  Vanadium and titanium are both common metals in aerospac/v 9abj)kvsz3 yc)bm 2gu 5j8ce engineering because they have a high strength to weight v359ab) k8m ccyvjsbz2 ujg)/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.