Which is NOT a characteristic property of metals resulting from metallic bondinuj4 n/).nfd 3- qrwobdg- w4ndqnrbju3 df. o)/?

Metallic bonding characth/ry(4t8;szx zo4xg perizes the bonding present in the elemental form of the metals oyos ;/p4 4xg tr8(hxzzn 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 characterized by the following sj pnsl bu.82m *gm-i)ztatement:

  Which of the following is NOT true of metals?g7savg (od5);u9mu5zzv ,i vq

Properties of substances can be related to the type of bonding, 5 )7ck0;wnipgu/ v.j9 yd nqodincluding electrical conductivit5jqnuyc;0pnd)w dk 7 v9gi/ o.y.
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*x lpa.r4g)ag;bk gwu8 y2vk- to, or indicates, the strength of metallic bondinglw)aark4up-g2x *; 8b.gvg ky?

Titanium, lithium, ant.q y9/zj:m+ry(j uogd 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, which series correctly orders ev+t*ro28mxb the elements by increasing melting points e+vm*xr tb8o2?

  The oxides of two peg j7btzj 9 yo0/ld5m3a pc2a)nriod 3 elements, X and Y, react in water according to the equag 5njdb3 m0ly2acoja/7)t 9zptions 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 pros2cel vsh0*m(7f/lao-jqk* a perties of the following using knowledge o v 27o-cheak / f(llmsajq**s0f chemical structure 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 bowl8j 0by +x nbtk/6c/onding 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 periqmbte( )zmmlbadd 2x/hc2u- uw5 -0h;odic table. The group 1 metals react with bromine to form soluble 2eh()-u aq m -zc/5d0 mmbthl;wd2buxbromide 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 tra1 n(v jw5-v7)rsj ovmqr/ lny)nsition 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 metu t9) :e-ny 9pmke8a e2t*f4zht/tnw aals results in high electrical condn -pftahzy4 n9 e8e 9a*/):utt2 ktewmuctivity?

  When comparing Ca to Ni, which of the following h 8oiqtr- wnm1 8;rs.kis true?

  Vanadium and titanium are both common metals in aerospace en+c.j tsxto3u8 gineering because they have a high strength to weiuocsx. 38 tj+tght 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.