Physics Unit29: Molecules and Solids - WebAssign

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习题练习：Physics Unit29: Molecules and Solids
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作者: physics 发布日期: 2023-05-01 14:26 总分: 27分得分: _____________

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

1#

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Covalent bonding is caux,mi q5appm/u 7dw77vjhg+k -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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2#

单选题切至整卷模式搜藏此题

Ionic bonding is caused+ ksp/*l3j* dsw qm8qd 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#

单选题切至整卷模式搜藏此题

The bond energy for a hydrogen molecub9u d9fozkf43zrf u0ok 2,gjl 4/dm;ule 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#

单选题切至整卷模式搜藏此题

Van der Waals bonding is cj arzy ry3cf5)g(l 80paused by (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#

单选题切至整卷模式搜藏此题

In general, which of the following is the strongest bocsif9.men la;,rxf1 dz1m 03ew5j :lund? (1.0 分)

A. hydrogen bond

B. van der Waals bond

C. ionic bond

D. covalent bond

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6#

单选题切至整卷模式搜藏此题

In general, which of the followi.* )xurbwye-k ng 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#

单选题切至整卷模式搜藏此题

For a diatomic quante ;kq)eil 0-h*ma4x; bglvh6 yum mechanical rotator, the energy difference between adjacent -bei;h k)6hy ae qvl;m4 x0*glenergy levels (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#

单选题切至整卷模式搜藏此题

A diatomic quantum mechanical rotator in the L = 1 quantum state hda v(n8p3iy /sl:k4xtyj,zk (khe:y4t9x,r eas energy E. The same rotator in the L = 2 quantum state will have ej ,s4t:y3 /,yknh4rdx(x98eiz:v(pltky e aknergy (1.0 分)

A. 2E.

B. 3E.

C. 6E.

D. none of the given answers

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9#

单选题切至整卷模式搜藏此题

In its lowest quantum s dc -dv2zd;di)tate, the energy of a diatomic 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#

单选题切至整卷模式搜藏此题

For a diatomic quantum mechanical vibrator, the energy difference betwee7m(;uxr6xm.a l rgr6 sn adjacent quan.x lum6m (ra;r7sgx6rtum 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#

单选题切至整卷模式搜藏此题

In its lowest quantum stat4tp(2uyi-bs (gdgnv20 d) ib be, a diatomic quantum mechanical rotator has a rotational eneri p 2g4gy)ddunbbsvt2 i0( b-(gy 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#

单选题切至整卷模式搜藏此题

A diatomic quantum mechanical vibrator in .zyu:)/ nrbctx- *gel iwwk;, its ground state has energy E. This same vibrator i/ :el.zb; u-k, iwcxty) gw*rnn its third state has energy (1.0 分)

A. E.

B. 3E.

C. 5E.

D. 7E.

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13#

单选题切至整卷模式搜藏此题

Metallic bonding is caf wqeixf6/dtke3e.nncn*xm0*l, 0 k .used by (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#

单选题切至整卷模式搜藏此题

In a good conductor, the highest energy barnl8ak ,5 g co9h 4znx-l y26.b)xvevrnd containing electrons is (1.0 分)

A. only partially filled.

B. completely filled.

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15#

单选题切至整卷模式搜藏此题

In a good insulator, the highest energy bany av,ap3:lo7iul z;c9k*s.g kd containing electrons, called the valplks7c *93i;kz.ov:g ,au al yence band, is (1.0 分)

A. only partially filled.

B. completely filled.

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16#

单选题切至整卷模式搜藏此题

An n-type semiconductor is maz. +rc4i s gvhb psjf 40lfn84)mx(3produced 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#

单选题切至整卷模式搜藏此题

A p-type semiconductor is praup6 1(:ie2djmk 2afyoduced 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#

单选题切至整卷模式搜藏此题

In a p-type semicondv,adsiex7 j4k-x7s w +uctor, 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#

单选题切至整卷模式搜藏此题

When a voltage is appliedqjpm.7q,,s-w iq(i lf3. ptl d across a p-type semiconductor, the 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#

单选题切至整卷模式搜藏此题

If a battery is connected to8 9- tru 6e.cjxyk)tna a diode with the positive terminal to the p side and the negative terminal to the n side, then diode is said to b)c-r6eutxn 98y. jk tae (1.0 分)

A. forward biased.

B. reversed biased.

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21#

单选题切至整卷模式搜藏此题

A simple junction transistor consists of three semiconductor sectixjk fx,ynkd7dhp4t k ,4ry,-7 ons consisting 7jyyt k-x4dpnrd ,kkh,47 fx,of (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#

单选题切至整卷模式搜藏此题

A diatomic quantum mechanical oscillator7)c xk6 ks:c)kqgg2sp 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#

单选题切至整卷模式搜藏此题

A diatomic molecule hasps)0;gczov 5a v5q ni yk01bq8 $2.6 \times 10^{-5} \; eV$ 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#

单选题切至整卷模式搜藏此题

A diatomic molecule has 1nw ;r5yoo6i4s7 i dysj:y *cl$18 \times 10^{-5} \; eV$ 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#

单选题切至整卷模式搜藏此题

Estimate the rotational energy (myarim33m0d (in eV) for a diatomic hydrogen molecule in the L =mm ayi(d3r m03 2 quantum state. (The equilibrium separation for the H2 molecule 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#

单选题切至整卷模式搜藏此题

A diatomic molecule is vibrating in the v = 1 quantum state with a freqqe 5sjhxm:78l uency of 7lesq5 jx m:h8$2.0 \times 10^{13} \; Hz$. 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#

单选题切至整卷模式搜藏此题

The energy gap between the valence and conduction ba dnc uvmc,d z+qub+6s278akj2nds in a certain semiconductor is 1.25 eV. What is the threshold wavuvj7qn z+m a+2dccu 268s,dkbelength for optical absorption in this substance? (1.0 分)

A. $599 \; nm$

B. $959 \; nm$

C. $873 \; nm$

D. $995 \; nm$

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总分:27分及格:16.2分时间:不限时

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