Which is NOT a characterixkkd6/-(mr2zc p pc+ qstic property of metals resulting from metallic bondingrmc2(/ k+xpd k pqcz6-?

Metallic bonding characterizes the bonding present in the elemental form of the u (powyual;- -7;qifk metals on the periodic table. ;pkai uy(wf7-l qou-;
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 followint vtbvxq 8)))wz)sfhp :hs m)p4f7gu7g statement:

  Which of the following is NOT true of m udg2jz1l 5zh5etals?

Properties of substanc fe7axii ri7b5v05h+rm8 vl9( lpdxc92 ux6zkes can be related to the type of bonding, including electri(icmzli+5 l v5u xh xibf09 e6r xrak72d7vp89cal 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 correspond xxx.8- t9tezwgt6p;r s to, or indicates, the strength of metallic 6xtw.-tz8r;p tx9xgebonding?

Titanium, lithium, and potassium+mj twom s.5umrcfe7du+w:0 3 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 the elements b2dn 5 roqu )u6nl(v7wid6*ita y increasing melting iorn(qlvw56dnu d 7u*)t 2ai6 points?

  The oxides of two perpw bg9nxnt6h5 i ef4;/s 5)fbaiod 3 elements, X and Y, react in water according to the equations belnbi 5pn/ag b;w 9ft6)fxs4eh5 ow.
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 ils3x2 49xm9 p7pkiqkfxm .e m:n physical properties of the following using knowledge of 9kkxl pme9:msx73qi2 xfp .4mchemical 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 reggkco/ h9c f)5zwv4bh 7arding metallic 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 ;w1 7l;eu dufac8amdo7vb.74ve qe;n periodic table. The group 1 metals react with bromine to form soluble bromide salts, which df1c .e;vdoem u8q477wal;nauv7 ;eb 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 cdev y7o z1m +gjljn:(+haracteristics 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 res8:riz ) yu*lbsults in high electr8u)*i:s b lyrzical conductivity?

  When comparing Ca to Ni, which of the oqaz+leno( /3e*p4dp15q+r 7ze cy u cfollowing is true?

  Vanadium and titanium are both common metal2qz vv-h/s1+fe kb7 96yf skdcs in aerospace engineering because they have a high2efq/bs d ky1hkvc-f69zv s7+ 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.