Atomic Structure Questions and Answers

A hydrogen atom is in the 72 4 m 1 state What are the possible values of its total angular momentum Express your answers numerically as a multiple of to three significant figures in ascending order separated by commas VAE Tablet L 0 00 1 41 2 45 4 47 Your submission doesn t have the correct number of answers Answers should be separated with 13 No credit lost Try again

3 a What is the energy of a photon created by an electron in Hydrogen jumping from n 5 to nf 2 Give your answer in eV E 458 2 10 21 1 6 10 14 W E 2 86cv b Use this energy and the general equation for energy of a photon to calculate the wavelength of this photon d 1 2 22 1 2 412 10 12 d 412 10 10 2 4 34 10 2 d 43424 c Show that the Rydberg formula gives you the same answer as in part b

5 a To ionize an atom means to remove an electron In the Bohr model this is effectively making nf o How much energy does it take to ionize an electron around Hydrogen in the ground state n 1 I 13 622 11 2 I E 13 bev b What is the wavelength of the light that would ionize this particular Hydrogen atom and in what part of the electromagnetic spectrum is that wavelength

24 Which is a reasonable estimate for the radius of a nucleus with mass 50 atomic mass units O about 3 68 x 10 15 m O about 6 17 x 10 15 m O about 4 42 x 10 15 m O about 8 49 10 15 m

23 What energy is required to remove the electron from a hydrogen atom in the 11 state Let the constant hcR 13 6 eV O 0 11 eV 0 094 eV 0 17 eV 0 080 eV O 0 14 eV

6 a In the Bohr model what is the orbital radius for an electron in the ground state of singly ionized Helium

4 A spectral line of Hydrogen is observed at 1094 nm and is known to start with an electron at n 6 Calculate the final orbit number for the electron

a To ionize an atom means to remove an electron In the Bohr model this is effectively making nf co How much energy does it take to ionize an electron around Hydrogen in the ground state n 1

Solution of the Schr dinger wave equation for the hydrogen atom results in a set of functions orbitals that describe the behavior of the electron Each function is characterized by three quantum numbers n and m If the value of n 1 The quantum number can have values from to The total number of orbitals possible at the n 1 energy level is If the value of 1 0 The quantum number my can have values from to The total number of orbitals possible at the 0 sublevel is

An element with an atomic number of 90 and an atomic mass of 230 would have what atomic mass after Alpha decay 226 231 228 230

Check your answers using the Gizmo Energy eV Transition n1 to n2 n1 to n3 n1 to n4 n1 to n5 n1 to n6 n2 to n3 n2 to n4 n2 to n5 Ve the electron for each transition listed in the table below Transition n2 to n6 n3 to n4 n3 to n5 n3 to n6 n4 to n5 n4 to n6 n5 to n6 n1 13 6ev n2 3 4ev n3 1 5 n4 0 8 n5 0 5 p6 4 Energy eV

2 Two object that were initially electrically neutral are rubbed together Afterward one object is positively charged and the other is negatively charged What explain the charge of these objects x The rubbing caused electrons to be transferred from one to the other The rubbing caused electric charge to be created from nothing The rubbing caused neutrons to be transferred from one to the other The rubbing caused protons to be transferred from one to the other

What is the energy in eV of a visible light photon with a wavelength of 600 nm Express your answer in electron volts View Available Hint s VAE

is the wavelength in nm of a photon with energy 0 900 eV VAXO Submit Request Answer Part B with energy 9 00 eV VAE Submit Part C Request Answer DAC DING nm nm

What is the wavelength of spectral line with n 11 in the Balmer series Express your answer to four significant figures and include the appropriate units H C

following quantities for the n 4 state of the hydrogen atom express your answers to b and c in terms of h a the possible quantum numbers of the electron b the largest and smallest values of the magnitude of the atom s orbital angular momentum c the largest and smallest values of the z component of the atom s total angular momentum which includes both orbital and spin components d the probability that the atom has zero angular momentum All attempts used correct answer displayed REFLECT Part O What are the possible values of the angular momentum of the n 1 state Express your answer in terms of the constant View Available Hint s

Calcium is element 20 on the periodic table So where did all the calcium currently in your bones originally come from a the accretion disks around neutron stars where matter becomes hot enough to make calcium Ob from the initial moments after the Big Bang itself when conditions allowed for fusion of heavy elements c from the generation of calcium in the cores of medium mass sun like stars d from supernova explosions of stars

Considering the sun as it is today which of the following does NOT play a critical role in supporting the sun s interior electron degeneracy pressure O b radiation pressure O c gas pressure

A nuclear power facility harnesses energy via what energy process? O cold fusion O nuclear fusion O chemical reaction O nuclear fission

One kilogram of uranium can produce as much energy as 16,000 kilograms of coal. Why is the energy output for uranium so much greater than the energy output for coal? A. Uranium is more highly purified than coal. B. Uranium is extremely radioactive and gives off higher electromagnetic radiation than burning coal. C. Uranium undergoes fission and nuclear reactions give off more energy than chemical reactions. D. Uranium is a highly reactive metal that reacts violently with oxygen during combustion.

What charge must the alpha particle have based on it's interactions with a positive nucleus? Explain how you can tell. (Remember that the charges interact by way of the Coulomb's Law force from your earlier lab)

The energy levels for a Bohr atom are shown below. If an electron moves from n = 5 to n = 1, what wavelength of light is emitted? (h= 6.626 x 10-34, 1 eV = 1.6 x 10-¹⁹ J) 95 nm 1281 nm 434 nm 4008 nm

Based on Quantum physics, the condition for a bound particle like an electron in an orbit, to remain in a stationary/ stable situation is that the orbit circumference should be an integral multiple of double of de Broglie wavelength (AB) square of de Broglie wavelength (Ag) half of de Broglie wavelength (AB) de Broglie wavelength (AB)

2. This scientist theorized that electrons could only orbit at specific distances and that atomic model included shells of specific energies. Rutherford Dalton Bohr Thomson

8. According to the uncertainty principle, you cannot know the ___ and the ___ of a particle simultaneously with 100% accuracy. charge, location position, momentum position, charge velocity, momentum

3. With what speed would a particle with a mass of 1.05 x 10-17 kg have to move if it had a de Broglie wavelength of 3.78 x 10-25 m? 6.31 x 108 m/s 1.68 x 108 m/s 3.94 x 108 m/s 2.03 x 108 m/s

Atomic models of graphite and diamond are shown. Graphite is a soft, dark material often used as a lubricant. Diamond is often a clear, hard crystal. Which of the following BEST EXPLAINS the difference in these materials? * The arrangement of the atoms of each one The elements of which each one is made The number of atoms each one is made of The size and shape of the individual atoms

The transition from the state n = 3 ton = 1 in a hydrogen like atom results in ultraviolet radiation. Infrared radiation will be obtained in the transition from- 3→ 2 4 → 2 4 → 3 2 →1

Hydrogen atom is excited from ground state to another state with principal quantum number equal to 4. Then the number of spectral lines in the emission spectra will be. A 2 B 3 C 5 D 6

The electron in the hydrogen atom jumps from excited state (n = 3) to its ground state (n = 1) and the photons thus emitted irradiate a photosensitive material. If the work function of the material is 5.1eV, the stopping potential is estimated to be (the energy of the electron in nth state

On reentry, the space shuttle's protective heat tiles become extremely hot: Part A Is the mechanical energy of the shuttle-Earth system when the shuttle lands greater than, less than, or the same as when it is in orbit? greater than when it is in orbit less than when it is in orbit the same as when it is in orbit

The de-Broglie wavelength of an electron in first orbit of Bohr's hydrogen is Equal to perimeter of the orbit Proportional to n (where n is principal quantum number) Proportional to 1/n (where nis principal quantum number) Equal to two times perimeter of the orbit

A gas of identical hydrogen like atoms has some atoms in the lowest energy level A and some atoms in excited energy level B. The atoms of the gas make transition to a higher energy level by absorbing monochromatic light photons of energy 2.55 eV. Subsequently, the atoms emits radiation of only six different photons energies. Some of the emitted photons have an energy of 2.55 eV, some have more energy and some have less energy than 2.55 eV, then Principal quantum number of initially excited level B is 3 Principal quantum number of initially excited level B is 2 Ionization energy of the atom is 54.4 eV Ionization energy of the atom is 13.6 eV

A hydrogen like atom (atomic number z) is in a higher excited state of quantum number 'n. The excited atom can make a transition to the first excited state by successively emitting two photons of energy 15.48 eV and 30.22 eV respectively. Alternately, the atom from same excited state can make transition to second excited state by successively emitting two photons of energy 4.9 eV and 10.58 eV. (Take ionization energy of H-atom = 13.6 eV)

An electron of an atom jumps down from one energy level to another and emits a photon that contains 8.83 x 10^-18 joule of energy. What was the frequency of the emitted electromagnetic energy? (a) 1.33 x 10¹6 Hz (b) 6.74 x 10¹5 Hz (c) 3.27 x 10-15 Hz (d) 7.5 x 10-¹7 Hz

The concentration of donor impurity atoms in silicon is N₁ = 10¹5 cm³. Assume an electron mobility of μn = 1300 cm²/V-s and a hole mobility of µp = 450 cm²/V-s. (a) Calculate the resistivity of the material. (b) What is the conductivity of the material?

What is the mass of one atomic mass unit? 1.67× 10-14 g 1.67× 10-24 g 1.67x 10-27 g 1.67× 10-23 g

Identify the type of bond in MgCl2. lonic bond Mettallic bond Polar covalent bond Covalent bond

Determine which of the following H atom electron transitions has the longest wavelength and which has the shortest wavelength: (a) n = 1 to n = 5 (b) n = 4 to n = 8 (c) n = 4 to n = 9 (d) n = 2 to n = 12 Longest-wavelength photon: a b c d Shortest-wavelength photon: a b c d

Given 1.692x10^23 particles of Ammonium, how many moles?

Which atomic particle is correctly paired with its location? A Neutron-mOutside the nucleus B Electron - Inside the nucleus C Proton - Inside the nucleus D Decatron - Outside the nucleus

Determine the following quantities for the n = state of the hydrogen atom (express your answers to (b) and (c) in terms of h): (a) the possible quantum numbers of the electron; (b) the largest and smallest values of the magnitude of the atom's orbital angular momentum; (c) the largest and smallest values of the z component of the atom's total angular momentum (which includes both orbital and spin components); (d) the probability that the atom has zero angular momentum.

The rainbow of visible colors in the electromagnetic spectrum varies continuously from the longest wavelengths (the reddest colors) to the shortest wavelengths (the deepest violet colors) our eyes can detect. Wavelengths near 655 nm are perceived as red. Those near 515 nm are green and those near 475 nm are blue. Calculate the frequency of light (in Hz) with a wavelength of 655 nm, 515 nm, and 475 nm. (a) 655 nm (b) 515 nm. (c) 475 nm

An incident x-ray photon with a wavelength of 0.0920 nm is scattered in the backward direction from a free electron that is initially at rest. What is the magnitude of the momentum of the scattered photon? What is the kinetic energy of the electron after the photon is scattered?

Time intervals measured with a stopwatch typically have an uncertainty of about 0.2 s, due to human reaction time at the start and stop moments. What is the percent uncertainty of a hand-timed measurement of (a) 5.5 s, (b) 55 s, (c) 5.5 min?

Given an electron beam whose electrons have kinetic energy of 10.0 keV, what is the minimum wavelengthAmin of light radiated by such beam directed head-on into a lead wall?

An electron in a hydrogen atom has a speed about the proton of 2.2x106 m/s. the relativistic and Newtonian values of kinetic energy will be differ by...... 0.0078% 0.0087% 0.0034% 0.0055 %

Where are the most reactive nonmetals located on the periodic table? A. the uppermost complete row of the table B. the rows at the bottom of the table connecting two sections C. the column at the far left side of the table D. the second column from the right side of the table