Physics Unit29: Molecules and Solids - WebAssign

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习题练习：Physics Unit29: Molecules and Solids
本Practice来源于WebAssign，是在线Practice的打印版，您也可以访问本平台网站(https://webassign.org/)直接在线完成(注册并登录账号后在首页左侧输入试卷号 328 即可在线作答)，，作答电子化后可随时回放，查看每题答案与详细解析，搜藏保存任意题目；教师使用本平台可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力。本试卷的直接作答链接 https://webassign.org/test328.html
作者: physics 发布日期: 2023-05-01 14:26

答题人: 匿名未登录开始时间: 23年05月01日 13:55 切换到: 单题模式

1#

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Covalent bonding is causto6x7k cot n9 (;4jsxted by (1.0 分)

A. the sharing of electrons between atoms.

B. the transfer of electrons between atoms.

C. unequal charge distributions around neutral molecules.

D. atoms bonding to hydrogen molecules.

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2#

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Ionic bonding is cau1e5yzzdf,s.ebc 0xj:sed by (1.0 分)

A. the sharing of electrons between atoms.

B. the transfer of electrons between atoms.

C. unequal charge distributions around neutral molecules.

D. atoms bonding to hydrogen molecules.

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3#

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The bond energy for a hydrogen c, hy-2aazp *mmolecule is (1.0 分)

A. $2.5 \; eV$

B. $3.5 \; eV$

C. $4.5 \; eV$

D. $5.5 \; eV$

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4#

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Van der Waals bonding is caused byzs/ civnab)/4xu +5s 9*ftqkv (1.0 分)

A. the sharing of electrons between atoms.

B. the transfer of electrons between atoms.

C. unequal charge distribution around neutral molecules.

D. atoms bonding to hydrogen molecules.

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5#

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In general, which of the follockwd(7. moz00 r nmdi.wing is the strongest bond? (1.0 分)

A. hydrogen bond

B. van der Waals bond

C. ionic bond

D. covalent bond

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6#

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In general, which of the :gfp:7 k o1w.fk. neuhfollowing is the weakest bond? (1.0 分)

A. hydrogen bond

B. van der Waals bond

C. ionic bond

D. covalent bond

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7#

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For a diatomic quantum,;d eo:z0 s6ynq5:xg0zvz dyk mechanical rotator, the energy difference between adjacent energy lz g56e0qx0nysdz ,dz o:vky;:evels (1.0 分)

A. increases as L increases.

B. decreases as L increases.

C. is constant for all L.

D. varies randomly as L increases.

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8#

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A diatomic quantum mechanical rotator in the L = 1 quantum state has a:+bja e;wi1q, 5qmqrjr0d n 4energy E. The same drj;1a, j4qn+a5 eq qw:mrbi0 rotator in the L = 2 quantum state will have energy (1.0 分)

A. 2E.

B. 3E.

C. 6E.

D. none of the given answers

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9#

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In its lowest quantum state, the energy of a diatomic z2bdxtz: 94vd harmonic oscillator is (1.0 分)

A. (1/4)hf.

B. (1/2)hf.

C. hf.

D. (3/2)hf.

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10#

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For a diatomic quantum mechiy.yc jp veo)xe:bn/ny3 p(09anical vibrator, the energy difference between adjacent quantp i 0.en3xvb)9(/n e:pycyyoj um states (1.0 分)

A. increases as v increases.

B. decreases as v increases.

C. is constant for all values of v.

D. varies randomly as v increases.

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11#

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In its lowest quantum state, a diatomic quav,a(l/lr ns f/ntum mechanical rotator has a rotationv ,f( /nall/sral energy of (1.0 分)

A. zero.

B. $h/2 \pi I$.

C. $h/\pi I$.

D. none of the given answers

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12#

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A diatomic quantum mechanical vibrator in its ground state h. kgk0tp(.3,fxsl7t8h pxdy has energy E. This same vibrator in its th 0 yf3(.lxgpkhdkt ph7xts,.8ird state has energy (1.0 分)

A. E.

B. 3E.

C. 5E.

D. 7E.

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13#

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Metallic bonding is caused byv.miv9 v;g6r 2qe9u1- jdimec (1.0 分)

A. the sharing of electrons by all atoms.

B. the transfer of electrons between atoms.

C. unequal charge distributions around neutral molecules.

D. atoms bonding to hydrogen molecules.

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14#

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In a good conductor, the highest energy band contai yiq ,b2oamb15ning electrons is (1.0 分)

A. only partially filled.

B. completely filled.

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15#

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In a good insulator, the(fc jg hsg6mkv5 z.+8h highest energy band containing electrons, called the valence band cmg6fj h.+ 5zh(kgv8s, is (1.0 分)

A. only partially filled.

B. completely filled.

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16#

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An n-type semiconductor is produc y7d0uz8:fc :b,z qt5mg v5xux8 hnsx+ed by (1.0 分)

A. doping the host crystal with donor impurities.

B. doping the host crystal with accepter impurities.

C. pure crystals of germanium.

D. none of the given answers

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17#

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A p-type semiconductor is pit1y99;6ugu uqc;oim roduced by (1.0 分)

A. doping the host crystal with donor impurities.

B. doping the host crystal with accepter impurities.

C. pure crystals of germanium.

D. none of the given answers

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18#

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In a p-type semiconduch s9d2vf94 oq 7olw:qjtor, a hole is (1.0 分)

A. a donor atom.

B. an extra electron supplied by a donor atom.

C. a missing atom in the crystalline structure.

D. a region where an electron is missing.

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19#

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When a voltage is applied across a p-type semiconductor, tf:5hzet: g:nt he holes (1.0 分)

A. are destroyed.

B. move toward the positive electrode.

C. move toward the negative electrode.

D. do not move.

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20#

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If a battery is connected to a diode with the positive tezm:i0j 32wpoc2bnxn9 rminal to the p side and the negative terminal to the n side, then diode jcm2xp3 2o n 9:nz0wibis said to be (1.0 分)

A. forward biased.

B. reversed biased.

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21#

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A simple junction transistor consists of three semiconductor section p3 lw7twjdk/ q)j4e(os consisting ofj/ oek )3(7jptwdq4wl (1.0 分)

A. pnp semiconductors.

B. npn semiconductors.

C. either pnp or npn semiconductors.

D. none of the given answers

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22#

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A diatomic quantum mechani dx6kkyub6uzg, 3-p) scal oscillator has a moment of inertia of $7.73 \times 10^{-45} \; kg \cdot m^{2}$. What is the rotational energy in the quantum state characterized by L = 2? (1.0 分)

A. $2.27 \times 10^{-5} \; eV$

B. $2.72 \times 10^{-5} \; eV$

C. $7.22 \times 10^{-5} \; eV$

D. $8.71 \times 10^{-5} \; eV$

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23#

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A diatomic molecule ha7fnv,ya53bi gs $2.6 \times 10^{-5} \; eV$ of rotational energy in the L = 2 quantum state. What is the rotational energy in the L = 1 quantum state? (1.0 分)

A. $3.4 \times 10^{-6} \; eV$

B. $5.3 \times 10^{-6} \; eV$

C. $7.8 \times 10^{-6} \; eV$

D. $8.7 \times 10^{-6} \; eV$

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24#

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A diatomic molecule 3 f hjlfid9bg4r76g+h4 g+ox ohas $18 \times 10^{-5} \; eV$ of rotational energy in the L = 2 quantum state. What is the rotational energy in the L = 0 quantum state? (1.0 分)

A. $9.0 \times 10^{-5} \; eV$

B. $6.0 \times 10^{-5} \; eV$

C. $3.0 \times 10^{-5} \; eV$

D. $0 \; eV$

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25#

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Estimate the rotational energy (in eV) for a diatomic hyzm yl8vp:ocu 7e0mf1)drogen molecule in the L = 2 quantum state. (The equilibrium separation for the H2 mole 7c1:u 8fomylzmp)e0vcule is 0.075 nm.) (1.0 分)

A. $0.011 \; eV$

B. $0.022 \; eV$

C. $0.033 \; eV$

D. $0.044 \; eV$

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26#

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A diatomic molecule is vibrating in the. -v0re c,(mv/b2mkv dgdb /m2 pigul4 v = 1 quantum state with a frequency of l2db-vb/i pv 2gkg rdv/c.( e,0umm 4m$2.0 \times 10^{13} \; Hz$. What is the energy of vibration? (1.0 分)

A. $0.041 \; eV$

B. $0.083 \; eV$

C. $0.12 \; eV$

D. $0.17 \; eV$

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27#

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The energy gap between the valence and conduction bands in a certain semicondu*nq3do j9p ye351i mtuctor is 1.25 eV. What is the threshold wavelength for optical absorption in oeuqpjnmi1339 5 tdy* this substance? (1.0 分)

A. $599 \; nm$

B. $959 \; nm$

C. $873 \; nm$

D. $995 \; nm$

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