Physics Unit28: Quantum Mechanics of Atoms

1#

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The probability of finding an electrok/ xh+exew2xr(- xt r7n in a hydrogen atom is directly proportionx/khr+ x(-w r7et2xex al to its

A. energy.

B. momentum.

C. wave function.

D. square of the wave function.

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2#

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State Heisenberg's Uncertainty Principr ,bqi6pa3kg 9le.

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3#

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The reason the positik vmt 0b+*a:iea/a kqc ur0i/)on of a particle cannot be specified with infinite precision ir u ) akam qta//*+i0b:ckevi0s the

A. exclusion principle.

B. uncertainty principle.

C. photoelectric effect.

D. principle of relativity.

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4#

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If the accuracy in measurinoo9;iri /9toqr;ws; z g the position of a particle increases, the accuracy in measuring its /;iqzowr;;s9r 9too ivelocity will

A. increase.

B. decrease.

C. remain the same.

D. be uncertain.

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5#

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If the accuracy in measuring th ,f9qn qtaft li3o1c75e velocity of a particle increases, the accuracy in measu 973at 51fcqftn,qoi lring its position will

A. increase.

B. decrease.

C. remain the same.

D. be uncertain.

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6#

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The quantity "h-bar" has a va1a9 rmmzc n+r/lue of

A. $1.055 \times 10^{-34} \; J \cdot s$.

B. $6.626 \times 10^{-34} \; J \cdot s$.

C. $8.85 \times 10^{-12} \; J \cdot s$.

D. $8.988 \times 10^{9} \; J \cdot s$.

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7#

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The principal quantum number can have any integgtnawam.n06f:: jkt2: d+ yjrer value ranging from

A. $-\infty$ to $+\infty$.

B. 0 to $+\infty$.

C. 1 to $+\infty$.

D. 1 to 100.

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8#

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The orbital quantum number can have any integer ;rd edo, xt1,mvalue ranging from

A. 0 to n.

B. 0 to (n-1).

C. 1 to n.

D. 1 to (n+1).

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9#

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The magnetic quantum number can have any integer value 7mni7po 4s5hxranging from

A. -n to +n.

B. -l to +l.

C. 0 to n.

D. 0 to l.

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10#

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The spin quantum number can have valu v64mt* ,iqwr;dt u/jges of

A. $-\frac{1}{2} , -1, 0, +1, +\frac{1}{2}$.

B. $-\frac{1}{2} , -1, +1, +\frac{1}{2}$.

C. $-\frac{1}{2} , 0, +\frac{1}{2}$.

D. $-\frac{1}{2} , +\frac{1}{2}$.

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11#

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If l = 4, which one of the following is a possible quantum number forx b1:r-h:uylh n?

A. 0

B. 2

C. 4

D. 8

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12#

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If n = 5, which one of the following is not an allowed mh09n u5wa)omuh;rd, d4 4sfzr,glar 1agnetic quantum number?

A. 0

B. 2

C. 4

D. 5

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13#

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The wave equation for hydrogen has solutions only if the three nue1wmg k2v4: quantum numbers $n$, $l$, and $m_l$ meet certain conditions. One of these conditions specifies that n

A. can be any real number.

B. can be any non-negative integer.

C. can be any integer.

D. can be any positive integer.

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14#

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The wave equation for hydrogen has solutiorw1 .u7wxf;er ns only if the three quantum numbers $n$, $l$, and $m_l$ meet certain conditions. One of these conditions specifies that l

A. is either zero or +1.

B. is either equal to or less than n-1.

C. is a positive integer.

D. has an absolute value that is either equal to or less than n.

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15#

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The wave equation for hydrogen has solutions only id/ tlki/uw n xpb2+m**f the three quantum numbers $n$, $l$, and $m_l$ meet certain conditions. One of these conditions specifies that $m_l$

A. has an absolute value either equal to or less than l.

B. is equal to or less than n.

C. is equal to or greater than 1.

D. can be any integer.

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16#

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In the ground state, the quantum gsh4r + ap:3kmnumbers ($n$, $l$, $m_l$, $m_s$) for hydrogen are, respectively,

A. 1, 1, 1, 1.

B. 1, 0, 0, 0.

C. 1, 0, 0, ±1/2.

D. 1, 1, 1, ±1/2.

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17#

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According to the selection rulh;9 xh*juv n(pe, when a photon is emitted or absorbed, transitions can only occu u(nj 9hph*;vxr between state with values of l that differ by

A. four units.

B. three units.

C. two units.

D. one unit.

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18#

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The number of electrons in a neutrew ni ;h4n, l9jrbt7h*al atom is called its

A. principal quantum number.

B. orbital quantum number.

C. magnetic quantum number.

D. atomic number.

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19#

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State the Pauli exclusion priys 17vylq 67loxw/19q t)trt3yxyp* z nciple.

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20#

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In terms of an atom's electron configuration, the letters K, L, M, and N referx35g 46b lmc d+vzzuzr ;qy5tv*g*i7o to*ic;yzqg6*bv g 5t zx4mr dlvz3uo57+

A. different shells with n equal to 1, 2, 3, or 4 respectively.

B. different sub shells with l equal to 1, 2, 3, or 4 respectively.

C. the four possible levels for the magnetic quantum number.

D. the four possible quantum numbers.

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21#

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What is the maximum numberke5vmm dmtw i di0re) :*yb4-, of electrons that can occupy the $g$ sub shell?

A. 10

B. 14

C. 18

D. 22

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22#

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How many possible sets of quantumgw+fxk0p -xts +aas 9tuk+8f10boo8e numbers or electron states are there in the $5f$ sub shell?

A. 2

B. 8

C. 10

D. 14

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23#

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The elements in the periodic table that have comxk1 8bj f crf/do1 yq3u/vf)o6pletely filled shells or subshells are xuqdv) b18cf1fo6/jo/f ryk3 referred to as

A. noble gases.

B. halogens.

C. alkali metals.

D. transition elements.

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24#

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The elements in the periodic table which lacqg0w 5*l9 n jh+o/;c8cbnwkhyk one electron from a filled shell are referred to asl0;*+bjnwco 85 whkc/ghy9 nq

A. noble gases.

B. halogens.

C. alkali metals.

D. transition elements.

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25#

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The elements in the periodic table which have a single outer s electp a d u+0a/+0gcbsaqx)ron are referred to acp)0qusb d/x ag+ 0+aas

A. noble gases.

B. halogens.

C. alkali metals.

D. transition elements.

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26#

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The word LASER is an agw6i,/qcr m f+hu3 beqbxa 5.(cronym for

A. Light Altered Spectra of Energy Radiated.

B. Latent Source of Enhanced Radiation.

C. Light Amplification by the Stimulated Emission of Radiation.

D. Light Absorbed States of Energetic Resonance.

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27#

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In order to produce a hologram, one needs, in addition to an object and a..jq0)w y))b lm1ak)mvn ye4u)rhij(kxo .ns piece of photogr)hona .w( e4bxk)))j.mk)muv jys.i y 1qn0 rlaphic film,

A. a beam of monochromatic light and a mirror.

B. a beam of monochromatic light and a lens.

C. a beam of coherent light and a lens.

D. a beam of coherent light and a mirror.

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28#

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When a hologram is illuminated with agz9f ;u +lglgg; m5jb- beam of coherent light, it produces

A. both a real and a virtual image.

B. only a real image of the object.

C. only a virtual image of the object.

D. none of the given answers

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29#

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An electron inside a hydrogen atom is confined to wlo0v e 5r3 uu-0t10xm./rq q*an yexzcithin a space of about 0.110 nm. If ornxe5 /ra 0tcq10.3q xvl0u-*uzmey the electron mass is $9.11 \times 10^{-31} \; kg$, what is the uncertainty in the electron's velocity?

A. $1.05 \times 10^{6} \; m/s$

B. $1.50 \times 10^{6} \; m/s$

C. $1.05 \times 10^{8} \; m/s$

D. $1.50 \times 10^{8} \; m/s$

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30#

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Suppose that the speed of an electron traveling 2000 m/s is known to2yl; zkcm a;9vm1-ase an accuracy of 1 parm9a;2cv;ezam 1- ysklt in $10^5$ (i.e., within 0.001%). What is the greatest possible accuracy within which we can determine the position of this electron?

A. $2.9 \; mm$

B. $5.8 \; mm$

C. $8.7 \; mm$

D. $1.2 \; cm$

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31#

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A measurement of an ele7,tvhs nse n91vbh;:tctron's speed is $2.0 \times 10^6 \; m/s$ and has an uncertainty of 10%. What is the minimum uncertainty in position?

A. $0.29 \; nm$

B. $0.58 \; nm$

C. $0.87 \; nm$

D. $1.2 \; nm$

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32#

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A baseball has mass 143 g and speed 45.0 m/s, with the speed known to within 0d rwn8m ( u./ifajhg.,.100%. What is the minimum uncertainhun 8f(r .wd/i,. ajgmty in the position of the baseball?

A. $1.56 \times 10^{-32} \; m$

B. $1.65 \times 10^{-32} \; m$

C. $1.56 \times 10^{-30} \; m$

D. $1.65 \times 10^{-30} \; m$

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33#

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The energy of an electron state has an uncertao gq:mnhgqaf7r))8v ax*gsf/m xo* utb, s+-0inty of about 0.500 eV. What is the uncerta)*0xo/ f ux*:o)rv-f8m,t+7gss a hmqqggbn ainty in the life-time of the level?

A. $1.32 \times 10^{-15} \; s$

B. $8.28 \times 10^{-15} \; s$

C. $1.32 \times 10^{-11} \; s$

D. $8.28 \times 10^{-11} \; s$

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34#

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An electron is known to be cj q24bs qul9p-jqb)w: onfined to a region of width 0.1 nm. What is an approximate expression for the least kinetic energl puq)-bb9:jw4s 2j qqy it could have, in eV?

A. $2.7 \; eV$

B. $3.2 \; eV$

C. $3.8 \; eV$

D. $4.3 \; eV$

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35#

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The radius of a typical nucleus is abw9mg*r zx1 qtkze6 lpm3:1it/ out $5.0 \times 10^{-15} \; m$. Assuming this to be the uncertainty in the position of a proton in the nucleus, estimate the uncertainty in the proton's energy (in eV).

A. $0.4 \; MeV$

B. $0.6 \; MeV$

C. $0.8 \; MeV$

D. $1.0 \; MeV$

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36#

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A hydrogen atom is id,u c7/q0uxie 2sbn1 bn the $6h$ state. Determine the principal quantum number.

A. 0

B. 5

C. 6

D. 7

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37#

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A hydrogen atom is isrgz l(-1a tu(5xrq,jn the $6h$ state. How many electrons are allowed in this state?

A. 22

B. 18

C. 14

D. 10

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38#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A hydrogen atom is in the p6mjclqi 2 80-ho g-8o*heanb$6h$ state. Which of the following could be an orbital quantum number?

A. 5

B. 6

C. 7

D. 8

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39#

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A hydrogen atom is in the ,pjyh; v;;bciepa79k8p zri,,hi a6b $6h$ state. Which one of the following is not a magnetic quantum number?

A. 0

B. 2

C. 4

D. 6

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40#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

In a hydrogen atom, a given electron has n = 7. 36+ni.0eiq9ihmt mdp7 yk 9hvHow many values can l have?

A. 6

B. 7

C. 15

D. 98

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41#

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In a hydrogen atom, a fruy f 4d n3 +e*ex*da0ml*h+jgiven electron has l = 7. How many values can $m_l$ have?

A. 6

B. 7

C. 15

D. 98

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42#

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In a hydrogen atom, an electron with n = 7 can exist in how m8 6gc)jm p;6qxo vbzj4any different quantum statep 6x bc4zoqjg6j;)8mvs?

A. 6

B. 7

C. 15

D. 98

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43#

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Consider ground-state helium holding two electrons in orbit. If one of tk: jc,6 evn :xe59kbhuhe electrons has quantum numbncvku,:e x bj59k:6e hers ($n$, $l$, $m_l$, $m_s$) of 1, 0, 0, -1/2 respectively, the quantum numbers for the other electron will be

A. 1, 1, 0, -1/2.

B. 1, 0, 0, +1/2.

C. 1, 1, 1, +1/2.

D. none of the given answers

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本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
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44#

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How many electrons will fit into a h7-d3dlh tph.q-wn z-$4f$ sub shell?

A. 3

B. 4

C. 7

D. 14

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45#

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The values of n and l fi.4a t4nyo tumo *d1:fton)7 w3r 5ymxor a $4f$ sub shell are

A. n = 4, l = 4.

B. n = 4, l = 3.

C. n = 3, l = 3.

D. n = 4, l = 2.

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46#

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A neutral atom has electron configuratio 2;w2k3lidq0d9w th f.)mgeg+e5e n*bz9o xf sn $1s^22s^22p^63s^23p^2$. What element is this?

A. carbon

B. nitrogen

C. silicon

D. germanium

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47#

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A neutral atom has an elecj4,j bn fy:zb.)kn-ttz tn .h:tron configuration of $1s^22s^22p^63s^23p^2$. What is its atomic number?

A. 5

B. 11

C. 14

D. 20

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48#

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A neutral atom has an electron configurati6zjoxt/b f 5p784zsm4 7buhoaon of $1s^22s^22p^6$. If a neutral atom holds one additional electron, what is the ground state configuration?

A. $1s^22s^22p^63s^1$

B. $1s^22s^22p^7$

C. $1s^22s^32p^6$

D. none of the given answers

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49#

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What is the electron con e,ym:mzn;8r jfiguration for Li which has three electrons?

A. $1s^3$

B. $1s^12s^2$

C. $1s^22s^1$

D. $1s^21p^1$

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50#

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High-energy photons are used to bombardg)k8qu3 bt2 ; mig4 1/xpmn2cy,j ukxl an unknown metal. The strongest peak is found for X-rays with an energy of 66 keV. What is the atomic number of 1yx xg8u4q2ibp;mjk)uk,m3 tn c/2 lgthe metal?

A. 80

B. 81

C. 82

D. 83

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51#

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What is the shortest-wavelength X-ray photony*2zxg 5izt6 0;mc icf emitted in an X-ray tube subject to 505iy ccm6;20*gt fiz xz kV?

A. $0.025 \; nm$

B. $0.25 \; nm$

C. $2.5 \; nm$

D. none of the given answers

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52#

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In a ruby laser, an electron jumps fro.qrxev v--os0z-du* b m a higher energy level to a lower one. If the energy difference between the two levels is 1.8 e-.*brs 0uzvvodqe- x-V, what is the wavelength of the emitted photon?

A. $469 \; nm$

B. $649 \; nm$

C. $694 \; nm$

D. $964 \; nm$

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