Atomic Structure Questions and Answers

Physics
Atomic StructureA nuclear power facility harnesses energy via what energy process?
O cold fusion
O nuclear fusion
O chemical reaction
O nuclear fission

Physics
Atomic StructureOne 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.

Physics
Atomic StructureWhat 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)

Physics
Atomic StructureThe 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

Physics
Atomic StructureBased 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)

Physics
Atomic Structure2. This scientist theorized that electrons could only orbit at specific distances and that atomic model included shells of specific energies.
Rutherford
Dalton
Bohr
Thomson

Physics
Atomic Structure8. 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

Physics
Atomic StructureThe energy levels for a Bohr atom are shown below.
If an electron moves from n = 3 to n = 1, what wavelength of light is emitted? (h= 6.626 x 10-19, 1 eV = 1.6 x 10-19 J)
103 nm
215 nm
164 nm
334 nm

Physics
Atomic Structure3. 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

Physics
Atomic StructureAtomic 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

Physics
Atomic StructureThe 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

Physics
Atomic StructureHydrogen 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

Physics
Atomic StructureThe 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

Physics
Atomic StructureOn 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

Physics
Atomic StructureThe 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

Physics
Atomic StructureA 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