Physics Unit28: Quantum Mechanics of Atoms

1#

The probability of findinggpmr /x:d2n 5sds;qm5 an electron in a hydrogen atom is directly proportional t2:s;mmnq g5rxd /5sp do its (1.0 分)

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 Unzw7bdsv+q nps ;. 3hl6certainty Principle. (1.0 分)

该题自我估分: (必填) (满分:1.0分)

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3#

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The reason the posit3r (vm:xsgc* wion of a particle cannot be specified with infinite precisionm*rg :vx cw3(s is the (1.0 分)

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 measuring the posi,c pztv5bhuzbh5cud+652;w r tion of a particle increases, the accuracy in measubc rh5v 5utzuz +;b,6c2 dpw5hring its velocity will (1.0 分)

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 the velocity of a particltlzqdl 68+ k50-a zvziwp s.1ge increases, the accuracy in measuring i - wa z6 d8+kg.lvl5iz0qs1pztts position will (1.0 分)

A. increase.

B. decrease.

C. remain the same.

D. be uncertain.

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6#

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The quantity "h-bar" h ;6nht /nuv4imtxt+9bas a value of (1.0 分)

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 integ 51t6wffepyu1 er value ranging from (1.0 分)

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 value ah ,btd., +nzwz5+ u7bajlo1cranging from (1.0 分)

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 h3u.0b i tbl1hcan have any integer value ranging from (1.0 分)

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 values cpw mi5c0h(yn 5t pv37pz)u .pof (1.0 分)

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 q vk(*ttt:yz)g k )nay7uantum number for n? (1.0 分)

A. 0

B. 2

C. 4

D. 8

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12#

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If n = 5, which one of thec qjoo0i6 hz+4wxn 9 -mbck+ftw:e0d; following is not an allowed magnetic quantum number? (1.0 分)

A. 0

B. 2

C. 4

D. 5

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13#

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The wave equation for hydrogen has solutiong:km22.2iw2ehzb4 9phc y x vbs only if the three quantum numbers $n$, $l$, and $m_l$ meet certain conditions. One of these conditions specifies that n (1.0 分)

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 soluti5 j9j -hf- xtmg4cu+jvons only if the three quantum numbers $n$, $l$, and $m_l$ meet certain conditions. One of these conditions specifies that l (1.0 分)

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 if th st(8mc*mv8mj( 1zezqe three quantum numbers $n$, $l$, and $m_l$ meet certain conditions. One of these conditions specifies that $m_l$ (1.0 分)

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 numbedcb1fhtiacqb4hn6b 7,/d4zrt+n7 3yrs ($n$, $l$, $m_l$, $m_s$) for hydrogen are, respectively, (1.0 分)

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 rule,henn 3r)qwl / ,fo0w1d when a photon is emitted or absorbed, transitions can only occur between sto ), 3r/hwnwdq1fe0n late with values of l that differ by (1.0 分)

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 neutral atom is called n7ck:2n to,p/ 2h zjauits (1.0 分)

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 pn,o:(p a w0gycrinciple. (1.0 分)

该题自我估分: (必填) (满分:1.0分)

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20#

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In terms of an atom's electron con+m8o6 7jfxvm gfiguration, the letters K, L, M, and N refer t+8gjm xmo 7fv6o (1.0 分)

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 number of 7gbf es2n2 7hbu0,jazelectrons that can occupy the $g$ sub shell? (1.0 分)

A. 10

B. 14

C. 18

D. 22

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22#

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How many possible sets of quantum n7 )sdtf+my9azz4gz 7numbers or electron states are there in the $5f$ sub shell? (1.0 分)

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 completely fillkdve209byxl :ed shells or subshells are refer0xv2de y lk:b9red to as (1.0 分)

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 lack one electron from a 0yn.l7icon 4f +)p0 zd-mjpiagk*.mj filled shell are referrfj )- 00+mpm. .ingz7iycp4kl j odna*ed to as (1.0 分)

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 haviivct e 1cm,am -qpdemt-v w*8qkcb 0n8h799 -e a single outer s electron are referred to a w- eb1ad9* -i,m-98i v7 kmqcemctqc h8tp0nvs (1.0 分)

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 acronytj 0sn lzt(b: bdag6q,av .z)*m for (1.0 分)

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 objeon 2vfh /amxm8 gqcyw6iw0).xl7,vb3ct and a piece of photographicf/,i)08lawm.bmyg27xn v hocq xv63 w film, (1.0 分)

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 a beam of coherent light, it prnqysnw 42(5nhh woa1. oduces (1.0 分)

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 within 0t 4(lxu ah1zwog5eo/q+gp ;aa space of about 0.110 nm. If the electron mass ist0a oh5 l upwzo(;/ egxa1gq4+ $9.11 \times 10^{-31} \; kg$, what is the uncertainty in the electron's velocity? (1.0 分)

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 tra ynz+5y9cj-6ii zk*ngveling 2000 m/s is known to an accuracy of 1 pa5-6 +njynizck* zi9 gyrt in $10^5$ (i.e., within 0.001%). What is the greatest possible accuracy within which we can determine the position of this electron? (1.0 分)

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 electron's speed ir- nqa;.s 1uy i0pvzrus)c6x 0s $2.0 \times 10^6 \; m/s$ and has an uncertainty of 10%. What is the minimum uncertainty in position? (1.0 分)

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 45.1);9t y)nayd*u tzts 0tyu5pt 0 m/s, with the speed known to within 0.100%. What is the mi1 ; *9td 0)tyt y)s5anzuytptunimum uncertainty in the position of the baseball? (1.0 分)

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 uncertainty2h 3bv7hnzvjq)e )1zu of about 0.500 eV. What is thhj3 uzeq)1vz b2v 7h)ne uncertainty in the life-time of the level? (1.0 分)

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 confined to a region of width 0.1 nm. What is an at7 :vkq/+o /j hf1exsqpproximate expression for tfk+v 7/oq s1/ eqtxj:hhe least kinetic energy it could have, in eV? (1.0 分)

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 about-wz9qpw) +nxjq1znd, $5.0 \times 10^{-15} \; m$. 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). (1.0 分)

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 in th(mxxehc ; ,7aze $6h$ state. Determine the principal quantum number. (1.0 分)

A. 0

B. 5

C. 6

D. 7

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37#

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A hydrogen atom is in th(+xb+kyg z+ kpe $6h$ state. How many electrons are allowed in this state? (1.0 分)

A. 22

B. 18

C. 14

D. 10

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38#

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A hydrogen atom is in thh ; ss)sng3q;je $6h$ state. Which of the following could be an orbital quantum number? (1.0 分)

A. 5

B. 6

C. 7

D. 8

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39#

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A hydrogen atom is in tl y , cai12bdl v cp9a-*9a5kkw9)b r7ealq+fshe $6h$ state. Which one of the following is not a magnetic quantum number? (1.0 分)

A. 0

B. 2

C. 4

D. 6

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40#

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In a hydrogen atom, a giv ampv)8f9 mtd.en electron has n = 7. How many values can l have? (1.0 分)

A. 6

B. 7

C. 15

D. 98

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41#

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In a hydrogen atom, a given electron has l = 7. How many values gz 1pz4d(e( fvcan $m_l$ have? (1.0 分)

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 many different quantnfo n4nc xh gm/5n8f(4um states/5o4 m(g8nfh4cnnnx f ? (1.0 分)

A. 6

B. 7

C. 15

D. 98

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43#

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Consider ground-state helium holding two electexhreww. 0b:yff9zn*r6im5 ,rons in orbit. If one of the electrons has quantum numbere. r6x:0wmy9hi b5wrf*n,fzes ($n$, $l$, $m_l$, $m_s$) of 1, 0, 0, -1/2 respectively, the quantum numbers for the other electron will be (1.0 分)

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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44#

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How many electrons will fit into a2 gamx2vxin bo9wf- 5( $4f$ sub shell? (1.0 分)

A. 3

B. 4

C. 7

D. 14

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45#

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The values of n and l for a 26r 1uim +hkbx$4f$ sub shell are (1.0 分)

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 electroptk 35uq(gt2 fn configuration $1s^22s^22p^63s^23p^2$. What element is this? (1.0 分)

A. carbon

B. nitrogen

C. silicon

D. germanium

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47#

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A neutral atom has an elec7qz+vrl k/4jmo 1fh,v gyi0l9tron configuration of $1s^22s^22p^63s^23p^2$. What is its atomic number? (1.0 分)

A. 5

B. 11

C. 14

D. 20

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48#

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A neutral atom has an elezurgw v:u;l ) :eo8wc*ctron configuration of $1s^22s^22p^6$. If a neutral atom holds one additional electron, what is the ground state configuration? (1.0 分)

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 config0n4)2h/sb8ffcf sgn,:/b 4)k6mjco g gcpsqpuration for Li which has three electrons? (1.0 分)

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 bombard an unknown met6k,5q jjna )/y78mytduihkr r :*wtk,al. The strongest peak is found for X-rays wtn, a jhiu/*k 8t6d,5 yw k)mj7y:qrrkith an energy of 66 keV. What is the atomic number of the metal? (1.0 分)

A. 80

B. 81

C. 82

D. 83

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51#

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What is the shortest-wavelength X-ray photon emitted in an X-ray tube su hks;77w:fz 1m r1gywbtlb.0sbject to 50 kV7bb.0rhz 1wsk 7ts:;w 1fmylg? (1.0 分)

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 from a /zmy;jsp.*ocd;o ik (higher energy level to a lower one. If the energy difference between the tw*yozocpi. (km;/d sj;o levels is 1.8 eV, what is the wavelength of the emitted photon? (1.0 分)

A. $469 \; nm$

B. $649 \; nm$

C. $694 \; nm$

D. $964 \; nm$

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