Which is NOT a characteristic property of metals resulting from metallic bon9nht9z802oyu1rzf np;lhe(7/sm ddvding?m0eho9 7pnd /(z f9 r 1hl8usy2nvd;tz

Metallic bonding characterizes the bondi wdg+g3.us.nc ng present in the elemental form of the metals on the periodic tabw +nsgu3.g.cdle.
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 follomkml321gx-h j,ih/ dowing statement:

  Which of the following is NOT true of metayc-m(+ i4g9odgg1g rl ls?

Properties of substances can be res2xfosu 9n-a, lated to the type of bonding, including electrica u2s n9o,sfx-al 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, or indicates, the streni bns..azw0 h6gth of metallic bondin.w.bi z6ha0nsg?

Titanium, lithium, and potassium have melting poi2i6k1( 3+q nli 8fc6kwadspsq nts 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 elemenzdh31e 0cn 9idps8vf8ts by increasing melci0 dp8eshz9 n vf38d1ting points?

  The oxides of two period 3 elements, X and Y, react in water accorq rt7r6u. pja5ding to the equations belo6 rqp7.5jautr 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 p0 *orp:zej ks. 1+q nq0ybp/jy*)t tvthysical properties of the following using knowledge of chemical structure tbpqj* kyzntt1pjvr .eq o:+)y 0s*0/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 1k0kh o/r2 rjtcorrect?
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 9x0;z1frmm 7gho9qxlk)q+ x l 1 of the periodic table. The group 1 metals react with bromine to form soluble bromide salts, which all have the same latmklf7+ l9zqx qm;r9gx10)ohx tice 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 characfrd29 nj+qvo 0ddui:(ny1uxn q; o ;7uteristics 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 chtci7q f c k.rj0u-l6f4l spc5xac6-m1aracteristics of transition metals results in high electrical condil1m x.tcqsl0cfj r66pkf 7cuca --54uctivity?

  When comparing Ca to Ni, which of f*(s c +b:erutc yew8sl: 76nzthe following is true?

  Vanadium and titanium are both common metals in . z:tge*uj,xw aerospace engineering because they have a high strength *tx:gz.euj w, 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.