Which is NOT a characteristic property of metals resulting from metallic bondqmhvy flcwe55/oq +d 0.l 5rf,ingh vlymcw fr /o 5de5ql05+fq,.?

Metallic bonding characterizes the bonding present in the elemental fyf u0yqnxi*5( orm of the metals on the peiyuf0ynq x (5*riodic 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 characte;n bz:) /kn qumou (g+v8wqg8zrized by the following statement:

  Which of the following is NOT true o66qly d9 sc3y+c4m wdof metals?

Properties of substances can be related to mkkvus .2 pm9k5d *kg:r;h5plthe type of bonding, including electrical condkl5d gpp mmv.2k*;5h k: krs9uuctivity.
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 indicatesxl( 7wu + 3x;t5vq, fuqoqdfr+, the strength of metallic xw;l57d+qu,u3fvxrq q + tof( bonding?

Titanium, lithium, andk2-o c3g*s zfj potassium 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,6rtd*j8jpjy.fz (crah 8+; 5yzs2r sp which series correctly orders the elements by increasing melting poinj8z;jrs .r r ypyf8d*p 256 zcjsat+(hts?

  The oxides of two period2 q(ql6tuij;np -y f -6adr1gi 3 elements, X and Y, react in water according to the equa2idpyi ula 1jtq;-nf(g6 q 6-rtions 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 physical properties of the following using knowled0 vmksu zdkcec( n-htix+:u()70kp5e ge of chemical structure and bondingdk x+u me0i0pk-:((vc5z 7ec)skuhn t :
.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 mettn y24j+7i8z+xrj nmuallic 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 periodic table. T0vszhz.21l gr d 1i7dfhe group 1 metals react with bromine to form soluble bromide salts, which all have the same lattice iz02d zld7v rs.1g1fhstructure.
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 charatdmmp: x(iwj. ;iz6 n;cteristics 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 res 3exldig z+ j/yz0c4;vpygza) le :0r,ults in high electrical condexzeayg4z0l gp/i3d;:r v,)l+ cyzj0uctivity?

  When comparing Ca to Ni, which of the fol9s./.wjqhs md (w+tnr lowing is true?

  Vanadium and titanium are both common metals in aerospace engineering because 7um*7lw un7r8n 4 xzcxthey hav4 wz7xun*7l c8nxm7 rue a high strength 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.