Models of Bonding & Structure B.1 The Ionic Model

1#

Which properties are typical of ionic compounds?

Volatility solubility in polar solvents

A. Volatility is high; Solubility in polar solvents is good.

B. Volatility is Low; Solubility in polar solvents is good.

C. Volatility is high; Solubility in polar solvents is Poor.

D. Volatility is Low; Solubility in polar solvents is Poor.

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2#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

In which instance is ionic bonding most likely to occur?

A. When two metals are chemically combined

B. When a non-metal in group 17 reacts with a non-metal from a different group

C. When a metal and a non-metal react with one another

D. When a noble gas reacts with the most reactive element in group 1

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3#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The reaction of solid magnesium with gaseous oxygen is shown.

Mg(s) + $\frac{1}{2}$$O_2$(g)→MgO(s)

Which of the following correctly describes the process of MgO(s) formation?

A. Magnesium atoms lose electrons to produce magnesium cations

B. Magnesium atoms lose electrons to produce magnesium anions

C. Magnesium atoms gain electrons to produce magnesium cations

D. Magnesium atoms gain electrons to produce magnesium anions

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4#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Which statements are correct about lattice enthalpies?
I.Salts with smaller lattice enthalpies have higher melting points
II.The lattice enthalpy depends on the charge of the constituent ions
III.The lattice enthalpy depends on the size of the constituent ions

A. I and II only

B. I and III only

C. II and III only

D. I, II and III

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5#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Sodium fluoride contains ionic bonding. Which statement correctly describes ionic bonding?

A. The electrostatic attraction between positive ions, arranged in a lattice, and delocalized electrons

B. A force of attraction that operates between molecules in a lattice

C. The electrostatic attraction between oppositely charged ions

D. The electrostatic attraction between a shared pair of electrons and positively charged nuclei

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6#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Which compounds have an ionic lattice in the solid state?

I.Ammonium sulfate

II.Hydrogen chloride

III.Sodium carbonate

A. I and II only

B. I and III only

C. II and III only

D. I, II and III

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7#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Which of the following polyatomic ions formulas is incorrect?

A. $N{O_3}^-$

B. $OH^-$

C. ${SO_4}^{2-}$

D. $C{O_4}^{2-}$

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8#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Which of the following is incorrect?

A. Formula is ${PO_3}^{3-}$, Name is phoosphate ion

B. Formula is ${Mg}^{2+}$, Name is magnesium ion

C. Formula is $C{H_3}CO{O^-}$, Name is ethanoate ion

D. Formula is ${Fe}^{3+}$, Name is iron (III) ion

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9#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Which of the following has covalent bonding?

I.$CCl_4$
II.$C{a_3}{N_2}$
III.$N{H_3}$

A. III only

B. I and II only

C. I and III only

D. I, II and III

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10#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Which of the following cannotcannot conduct electricity in a molten state?

I.$PC{l_3}$

II.NaCl

III.$S{O_2}$

A. I and II only

B. II and III only

C. I, II and III

D. I and III only

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11#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Which of the following statements correctly describes what happens when magnesium fluoride is formed?

A. One magnesium atom gains two electrons to achieve a full outer shell of electrons

B. For every magnesium ion formed, two fluorine atoms each gain one electron to form two fluoride ions, each with a single negative charge

C. Two fluorine atoms each gain one electron, to form a fluorine molecule where each atom has a full outer shell

D. Electrons are transferred from the fluorine atoms to the magnesium atoms

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12#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

What is the formula of the compound formed between lithium and nitrogen?

A. $Li{N_3}$

B. $Li{N_2}$

C. $L{i_2}{N_3}$

D. $L{i_3}N$

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13#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Which of the following is the correct formula for strontium sulfide?

A. $S{r_2}{S_2}$

B. $Sr{S_2}$

C. SrS

D. $S{r_2}S$

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14#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Metal M is in group 2 of the periodic table. Which is the correct formula?

A. ${M_2}(N{H_4})_2$

B. MC$l_3$

C. $M_2SO_4$

D. $M_3(P{O_4})_2$

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15#

填空题 ( 1.0 分) 切至整卷模式搜藏此题

1.Explain the difference in physical properties of the following using knowledge of chemical structure and bonding:1.The boiling point of hydrochloric acid(HCl) is than that of lithium chloride (LiCl).

2.Calcium bromide($CaBr_2$) conduct electricity in a molten state and aqueous solution, and bromine ($Br_2$)
.
3.The boiling point of $HI$ is than $I_2X$
2.Arrange bromine($Br_2$), potassium and potassium bromide in order of increasing boiling points. ＜＜

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16#

填空题 ( 1.0 分) 切至整卷模式搜藏此题

Calcium phosphide is used in explosives and fireworks.

1.Describe the bonding that exists between calcium and phosphorous in calcium phosphide.
2.State the chemical formula for calcium phosphide.
3.Calcium can also bond with thiocyanate to form calcium thiocyanate,($Ca(SCN)_2$). Deduce the ion charge on thiocyanate.
4.Calcium compounds usually exist as a crystal lattice in the solid state. Describe what the lattice enthalpy can reveal about the bonds in the compound, referring to the magnitude of the lattice enthalpy in the answer.
5.Calcium fluoride ($CaF_2$) and calcium oxide
(CaO) are two examples of ionic compounds of calcium. Choose the lattice enthalpy of CaO is than the lattice enthalpy of $CaF_2$
6.Predict, whether calcium oxide (CaO) or calcium fluoride ($CaF_2$)
will have a melting point.

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