Which is NOT a characteristic property of metals resulting from mtbrewh (gugjqu+:/e 5od*c/ ia6 n96betallic bonding?/9w5: ghob rt66(ib ue*/+q e cadgunj

Metallic bonding characterizes the bonding present in the elemental form of the xrhih(cle sh7+l 0qp1p:f9 -dmetals on the + : hesr7lh1 p(dhlicx0p9 qf-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 charae 2k lr,il ed 9z,h.ic9doamn:bna:c55j) o0fcterized by the following statement:

  Which of the following is NOT bf.psp h 01roow4gu 2)m,nj*a true of metals?

Properties of substances can be8--lht4htd qb related to the type of bonding, including electrical ql -dbth t-84hconductivity.
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, d*+.gdx.yr33fhq07 mqjdn ddor indicates, the strength of metallicdj7d0gx d +dhf3m ryq.q3.n *d bonding?

Titanium, lithium, and potassium have mo,, rvt6 oqkgjx bam45y,.s: yelting 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 element7qbqm nxi3e+e( drhhd-dvx : /db 2r:av9+t3 is by increasinqvn3ddm -+:xv2rbibh ri: 9ex(d7 +a3e/ht dqg melting points?

  The oxides of two period 3 elemt4 03w0qpo kq6rk)mo/fo d gg0ents, X and Y, react in water according to the equationw o0mdgfqg 3ko0r4q 06k) /ptos 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 differesix(39nsl:tnn+ur 7yj( xrw0nce in physical properties of the following using knowledge of chemical yt(0u( nij:rr379sswxlx+nn 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 bonding are coaosgo)g0et15d q3e (emmz(p*rrect?
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 tabl .wjaya/n*s;) jqlz8 oe. The group 1 metals react with b/s;a. l*zan)wo8jj qy romine 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 vt6 ee ,*nh. jgiig+l*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 of transition metals results 3 ybkfkq(1(htin high electrical condk 1k3yfth q((buctivity?

  When comparing Ca to q8 sqm)s sua hs d2t2mm+nxwb93sd.:8Ni, which of the following is true?

  Vanadium and titanium are both common metals in aerospace engineering because dze7 qo6)2kee they have a high strength 2z)ee7dk qo6eto 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.