Не 24 Ne(2p) 20 16 Ar(3p) Kr(4p) Xe(5p) 12 Hg(5d) Rn(6p) Zn(3d) Cd(4d) 8 Ga In TI Li 4 Na K Rb Čs Fr 10 20 30 40 50 60 70 80 90 Atomic number (Z) Ionization energy (eV) 0.25 -Cs- Rb K 0.20 Na Li Хе Kr 0.10 Ar Ne -Не- |246 10 20 30 40 50 Atomic number (Z) Atomic radius (nm)

Q: What is the value of the expression 1/2 (3x - 5) +5 when x= -3? A. 2 OB. 4.5 O C. -2 D. 7

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Q: IF an unknown element has 30 neutrons and a quantum number sequence of 3, 2, -2, -1/2 identify: Z=…

A: number of neutrons = 30 quantum number sequence = 3 , 2 , -2 , -1/2

Q: An alpha particle (Z = 2, mass = 6.64 x 10-27  kg) approaches to within 1.00 x 10-14 m of a carbon…

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Q: Compute the values of the magnetic dipole moments expected from the shell model, and compare with…

A: A magnetic moment is a unit of measurement that measures the magnetic strength and direction of a…

Q: 130 130Xe is 129.903509 54 What is the binding energy of 54 Xe? The atomic mass of u. The mass of a…

A: Given that,  The atomic mass of 132Xe54, M N= 129.903509 u Mass of hydrogen atom M h= 1.00783 U Mass…

Q: Determine the Larmor frequency for the free hydrogen nuclei in the following magnetic field…

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Q: c) The nucleus of which atom contains 49 neutrons? A 32 S 16 B 22 48 Ti C Rb 86 37 112 Cd 48

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Q: 2- Find the density of Gold nuclei Au(197, 73) where Au(A, Z)

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Q: Calculate the distance of closest approach for a head-on collision between a 5.30 MeV alpha particle…

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Q: The nucleus is positive and electrons are negative. Why is there space between them, can't they just…

A: The nucleus is positive and electrons are negative. Why is there space between them, can't they just…

Q: what would be the atomic number of an element that would result from beta particle emission from 46…

A: The atomic number of obtained element in Beta minus decay is 36. The atomic number id obtained…

Q: An investigator has 0.010 μg samples of two isotopes of strontium, 89Sr (t1/2 = 51 days) and 90Sr…

A: Given: The half life of 89Sr is 51 days. The half life of 90Sr is 28 years.

Q: The vibrational frequency of 1H2 is 131.9 THz. What is the vibrational frequency of 2H2 and of 3H2?…

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Q: The cadmium isotope 109Cd has a half-life of 462 days. A sample begins with 1.0 × 1012 109Cd atoms.…

A: According to the relation, N=N0etτ N0 is the initial number of Cd atoms, N is the number of atoms…

Q: Given that the binding energy is 2.28 eV, what power is carried away by the electrons?

A: Given: Binding energy = 2.28 eV To determine: Power carried away by the electrons. Formula used:…

Q: Measured X-ray energies for Silver (Z=47) are: K_alpha= 21.990 keV, K_beta=25.145. The binding…

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Q: With the aid of an atomic schematic diagram, i.e. Cu, discuss the process involved that leads to the…

A: The figure shows the schematic atomic diagram for Cu.

Q: A laser with power output of 2.0mW at a wavelength of 400nm is projected onto a calcium metal. The…

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Q: Element X has three naturally occurring isotopes. The masses (amu) and % abundances of the isotopes…

A: Dear student The average atomic mass of an atom can be found by : Mav = f1m1 + f2m2 + f3m3 Where f…

Q: 11.36

A: Energy of UV photon of wavelength λ is the sum of ionization energy IE and the kinetic energy KE of…

Q: A radiation oncologist treats cancer with two species of radioactive nuclei, X and Y. The initial…

A: As per radioactive decay law, the present number of radioactive nuclei of the used species can be…

Q: How many possible subshells are there for the n = 4 level of hydrogen? (a) 5 (b) 4 (c) 3 (d) 2 (e) 1

A: The principal quantum number is n = 4 The expression for the orbital quantum number is given as,…

Q: Find the binding energy of the hydrogen electron for states with the following principal quantum…

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Q: What is the binding energy of the nucleus of a neutral gold atom,    in units of joules?  Work the…

A: Number of Protons in a neutral Gold atom=79Mass of proton=1.00727647 amuNumber of Neutrons in a…

Q: An archaeologist finds some ancient jewelry made from bone. The jewelry has a carbon mass of 146 g…

A: Given data: The mass of carbon is m=146 g. The molar mass of 12C is M=12 g/mol. The decay rate of…

Q: When the principal quantum number is n = 5, how many different values of (a) ℓ and (b) mℓ are…

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Q: The only stable isotope of gold (element symbol Au; atomic number 79) is 197AU. The atomic mass of…

A: Given mp = 1.007276 u mn = 1.008665 u M(Au197 ) = 196.966543 u

Q: The atomic polarizability α of Potassium (K) is 43.4 x 10−30 m3, calculate the radius of k atom.

A: Given that the atomic polarizability α of Potassium (K) is  43.4x10 -30m3.  We have to calculate the…

Q: By using the principle of accuracy, he proved the impossibility of the electron being inside the…

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Q: 11 In Geiger and Marsden's a-particle scattering experiment, a-particles were directed at a very…

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Q: +92 9 a 01. 9=5,2 cm 7=1,8MC 73=11,8MC 2 %3D 92- 1,84 C CACULAT F iN q, THAT PRODUCE 9, 9 AND q4 2)…

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Q: How many neutrons in the following element? 238 92 Select one: O a. 238 O b. 92 O c. 330 O d. 146

A: Given: The atomic mass of the element is 238. The atomic number is 92.

Q: An alpha particle (Z = 2, mass = 6.64 × 10−27 kg) approaches to within 1.00 × 10-14 m of a carbon…

A: Given data   The atomic number of an alpha particle is Z = 2. The mass of an alpha particle is m =…

Q: In Rutherford’s famous set of experiments described inSection 27–10, the fact that some alpha…

A: In the Rutherford experiment, the alpha particles are deflected at the large angles, it is due o the…

Q: When sodium in the 2P3/2 state is placed in a magnetic field of 1.20 T, the energy level splits into…

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Q: 235 U→ 92 132 In the reaction n+ Sn + X+3 what are the mass number and the atomic number of the…

A: Given:  Reaction : n01+U92235→S50132n+X+3n01 Let's find mass no. & atomic no. of X.

Q: 234 U has an time constant 3.13 x 105 years. How long will it take to reduce a sample of 6,542 234 U…

A: Given data, At the start N0=6542 At the end N=3646 Time constant τ=3.13×105 years

Q: C, = 3P V, = ,Q,= Cz = 4.5 F 100V C3 = 6F = 2.6 F

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Q: What is the atomic number Z of the element with the electron configuration 1s 25²2p°35²3p°3d4s? 04…

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Q: What is the mass-defect of Nickel, N-62 (atomic number = 28, atomic weight = 61.928345) Group of…

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Q: How many half lives must pass for a substance to lose 87.5% of its original amount? Group of answer…

A: N(t)=No(0.5)t/h h=half life N(t)=100-87.5=12.5 No = 100

The Bohr model

Students often get confused between Rutherford’s model and Bohr model of an atom. They interpret the postulates of both these models to be the same, which is incorrect. Rutherford’s model differs from Bohr’s model in the following ways: