Which is NOT a characteristic property of metals resulting from metallic bony pbo3o1 ji5 1t-ty2i: uiuw9*npy 8ap2r8og bding?-*p82iuoiw:pgy 2 ny91bojuba 83oyrp i 1t t5

Metallic bonding characterizes th//ntkgrsx ht pn e;fx:h6h,7,-mdck/e bonding present in the elemental form of the metals og// xt t6n/dsfrhnhkc -h,;xk:m ,p7e n 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 q),d(z wja+p 7gzo; wcbest characterized by the following statement:

  Which of the following is NOT truekm n+8so/vaf:h 85mze of metals?

Properties of substances can be related to the type of bonding, inc 6bfps 5w kwi91qi23zhmpz1o2. ;v ezaluding electrica1f o1;wq2 ihiv6pepz.azk9 2zwsbm 5 3l 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 bes st lw0hj4oa:ev vulsfar :od-n4 q)1 )72to6ht corresponds to, or indicates, the strength of metallic bond ou1 aw-)sljaofsl: ode7vvt 4h6q) n4 h:r0t2ing?

Titanium, lithium, and potassium have melting-kbkt xmi63ta1r3w3 v 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. )rswj,g3 fk.b-vh mvies correctly orders the elements by increasing megms j .). hr,-vk3bwfvlting points?

  The oxides of two period 3 el(k: v4, qz ki1vczxqh. o+:cqyements, X and Y, react in water according to the equations belov:hy4 qxq+v. cq,:i1 (czokzk w.
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 rr5z8hp( i zsry7)9mccub-po2h y2+v physical properties of the following using knowledge of chemical structure and8 9mry)c22p5hubzc7rzhy ip- ovs( r+ 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 bonding are corre deoa+)z ag88ect?
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 group 1 metals reactqio :2wnlt qku8a+7p: withklwt82: +uaoqn qpi7: bromine 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 characteristicbp rh4b,7c,0n v+d d m2jhyy0ws 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 of transition metals rf1gh g a.c;3z cjl-z;w;vr(glesults in high electrical condc;.jz; z ;a1rwfhcg3vllg ( g-uctivity?

  When comparing Ca to Ni, which of the fol 9jspx:ml )vz+lowing is true?

  Vanadium and titanium are both commonkaovp2dwt2v 12w s 6tcq 4/mpbt*7aj; xmi(:e metals in aerospace engineering because they have a high streng 4md( wpm2 a bt:t27x2sc*jowt v6a1;vkpeiq/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.