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Page 1 of 7 This chapter has 47 questions. Scroll down to see and select individual questions or narrow the list using the checkboxes below. 0 questions at random and keep in order Multiple Choice Questions - (38) Topic: Atomic spectra and the Bohr model of the atom - (11) Fill In The Blank Questions - (9) Topic: Cathode rays, electrons, and X-rays - (9) Odd Numbered - (24) Topic: Particle waves and quantum mechanics - (8) Even Numbered - (23) Topic: The existence of atoms: Evidence from chemistry - (10) Accessibility: Keyboard Navigation - (38) Topic: radioactivity and the discovery of the nucleus - (10) Difficulty: Easy - (32) Type: Conceptual - (46) Difficulty: Hard - (4) Type: Definition - (11) Difficulty: Medium - (11) Type: Numerical - (1) 1. A chemical reaction is one in which → atoms get rearranged. a substance gets hot. atomic nuclei change form. atoms change mass. Accessibility: Keyboard Navigation Difficulty: Easy Topic: radioactivity and the discovery of the nucleus Type: Conceptual Type: Definition Multiple Choice Question MC A chemical reaction is one in which 2. A true statement about atoms is that they can emit radiation at frequencies only within the visible spectrum. → can emit radiation only at specific frequencies. all have the same number of electrons. can emit radiation at any frequency. Accessibility: Keyboard Navigation Difficulty: Easy Topic: Atomic spectra and the Bohr model of the atom Type: Conceptual Multiple Choice Question MC A true statement about atoms is that they 3. Lead (a solid) may be changed into mercury (a liquid) by dissolving the lead in acid so that it loses enough mass to have the same mass as mercury. grinding the lead to dust and then melting the dust. heating the lead to extremely high temperatures. → none of these. Accessibility: Keyboard Navigation Difficulty: Easy Multiple Choice Question Topic: The existence of atoms: Evidence from chemistry MC Lead (a solid) may be changed into mercury (... Type: Conceptual 4. The maximum number of electrons allowed in the n = 1 shell of sodium is → 2. 4. 6. 8. unlimited. Multiple Choice Question MC The maximum number of electrons allowed in t... 5. The systematic arrangement of all known elements is known as the angular momentum chart. → the periodic table of elements. the chemical dictionary of Arrhenius. the metric conductance/reflectance table. Accessibility: Keyboard Navigation Difficulty: Easy Topic: Particle waves and quantum mechanics Type: Conceptual Type: Definition Accessibility: Keyboard Navigation Difficulty: Easy Topic: The existence of atoms: Evidence from chemistry Multiple Choice Question Type: Conceptual MC The systematic arrangement of all known elem... Type: Definition 6. Different atoms in the same column of the periodic table of elements have a simple ratio of masses. have equal masses. have identical chemical properties. → have similar chemical properties. Page 2 of 7 Multiple Choice Question MC Different atoms in the same column of the pe... Accessibility: Keyboard Navigation Difficulty: Easy Topic: The existence of atoms: Evidence from chemistry Type: Conceptual 7. A diamond is the hardest mineral on Earth, yet it is mostly empty space because the carbon atoms are not as close together as they should be. held together by electrical forces. → themselves mostly empty space. in perpetual motion. Multiple Choice Question MC A diamond is the hardest mineral on Earth, y... 8. When an atom has an electron removed, then its net charge is unchanged. negative. → positive. It is impossible to remove an electron from an atom. Accessibility: Keyboard Navigation Difficulty: Easy Topic: radioactivity and the discovery of the nucleus Type: Conceptual Accessibility: Keyboard Navigation Difficulty: Easy Multiple Choice Question Topic: Cathode rays, electrons, and X-rays MC When an atom has an electron removed, then i... Type: Conceptual 9. If 42 g of nitrogen reacts completely with 9 g of hydrogen (atomic mass 1) to form ammonia (NH3), the atomic mass of nitrogen must be 55. 3. 49. 52. → 14. Multiple Choice Question MC If 42 g of nitrogen reacts completely with 9... 10. Which is the smallest entity in the following list? Atom → Electron Molecule Nucleus Accessibility: Keyboard Navigation Difficulty: Medium Topic: The existence of atoms: Evidence from chemistry Type: Numerical Accessibility: Keyboard Navigation Difficulty: Easy Multiple Choice Question Topic: The existence of atoms: Evidence from chemistry MC Which is the smallest entity in the followin... Type: Conceptual 11. The Bohr theory of the atom made the following BOLD assumption: → Electrons in certain orbits do not radiate electromagnetic waves despite being centripetally accelerated. All atoms contain "special" electrons that do not radiate their energy. The electrons in some orbits are paired so as to become stable. The stable orbits are maximally occupied with electrons. Multiple Choice Question MC The Bohr theory of the atom made the followi... 12. The force that holds electrons within atoms is the gravitational force with the nucleus. magnetic force between the electrons. → electrical force with the nucleus. nuclear force with the nucleus. Multiple Choice Question MC The force that holds electrons within atoms ... 13. A pencil has no electric charges in it. no nuclei in it. electrons that are not attracted to nuclei. Accessibility: Keyboard Navigation Difficulty: Medium Topic: Atomic spectra and the Bohr model of the atom Type: Conceptual Type: Definition Accessibility: Keyboard Navigation Difficulty: Easy Topic: radioactivity and the discovery of the nucleus Type: Conceptual Page 3 of 7 → enough positive charge in the nuclei to balance the negative charge of the electrons. Multiple Choice Question MC A pencil has 14. A true statement about atoms is that they are basically unstable. all have the same number of electrons. are big enough to be seen by the eye. → consist mostly of empty space. Accessibility: Keyboard Navigation Difficulty: Easy Topic: radioactivity and the discovery of the nucleus Topic: The existence of atoms: Evidence from chemistry Type: Conceptual Accessibility: Keyboard Navigation Difficulty: Easy Topic: radioactivity and the discovery of the nucleus Type: Conceptual Multiple Choice Question MC A true statement about atoms is that they 15. A true statement about the modern theory of light is that light can only behave like a particle in atoms. → light can behave like a wave or a particle depending on the situation. light waves do not carry energy but photons can. photons do not have a frequency. Accessibility: Keyboard Navigation Difficulty: Easy Multiple Choice Question Topic: Particle waves and quantum mechanics MC A true statement about the modern theory of ... Type: Conceptual 16. One of the fundamental ideas in the development of quantum mechanics was that electrons and protons are the only particles. no two particles can have the same energy. → all particles have wave properties. all particles are formed by the interaction of electromagnetic waves with mass. Accessibility: Keyboard Navigation Difficulty: Easy Topic: Particle waves and quantum mechanics Type: Conceptual Multiple Choice Question MC One of the fundamental ideas in the developm... 17. What is "uncertain" in the Heisenberg Uncertainty principle? The time period of the wave describing the particle. The value of the Planck's constant. The energy of the particle when it has wave properties. → The value of the particle's position when the particle's momentum is known precisely. The exact number of protons in the nucleus. Accessibility: Keyboard Navigation Difficulty: Easy Multiple Choice Question Topic: Particle waves and quantum mechanics MC What is uncertain in the Heisenberg Uncert... Type: Conceptual 18. Quantum mechanics has accurately described the regularities of the periodic table by assigning "quantum" numbers to predict the allowed energy levels. The true statement about quantum numbers is that they describe the position and charge of the electrons in the atoms. no electrons in the world can ever have the same set of quantum numbers. there are never more than 8 different sets of quantum numbers in an atom. → no two electrons in the same atom can have the same set of quantum numbers. Accessibility: Keyboard Navigation Difficulty: Easy Multiple Choice Question Topic: Particle waves and quantum mechanics MC Quantum mechanics has accurately described t... Type: Conceptual 19. Dalton developed _________ as one of the foundations for the atomic theory. the law of supply and demand the Principle of Equivalence → the Law of Definite Proportions Mach's Principle the index of refraction Multiple Choice Question MC Dalton developed _________ as one of the fou... 20. Cathode rays produced in a gas discharge tube are Accessibility: Keyboard Navigation Difficulty: Easy Topic: The existence of atoms: Evidence from chemistry Type: Conceptual Type: Definition Page 4 of 7 → Gamma rays. Protons. X-rays. Electrons. Alpha particles. Multiple Choice Question MC Cathode rays produced in a gas discharge tub... 21. This form of natural radioactivity will be deflected by a magnetic field. X-rays Gamma rays Anode rays → Alpha rays Accessibility: Keyboard Navigation Difficulty: Easy Topic: Cathode rays, electrons, and X-rays Type: Conceptual Type: Definition Accessibility: Keyboard Navigation Difficulty: Easy Multiple Choice Question Topic: Cathode rays, electrons, and X-rays MC This form of natural radioactivity will be d... Type: Conceptual 22. In the scattering of fast alpha particles by a thin foil of gold, Rutherford and his collaborators observed alpha particles interacting with nuclei to produce beta rays and alpha particles moving equally in all directions. cathode rays emerging from the foil. most of the alpha particles bouncing straight back with very few passing through the foil undisturbed. → a very few alpha particles scattered through large angles with most undergoing very little scattering. Accessibility: Keyboard Navigation Difficulty: Easy Multiple Choice Question Topic: radioactivity and the discovery of the nucleus MC In the scattering of fast alpha particles by... Type: Conceptual 23. The idea that light could be emitted only in discrete chunks, or quanta, instead of in continuous amounts was first put forth to explain which of the following phenomena? → Blackbody radiation. X-rays. The spectrum of atomic hydrogen. Cathode rays. Radioactive decay. Accessibility: Keyboard Navigation Difficulty: Easy Multiple Choice Question Topic: Atomic spectra and the Bohr model of the atom MC The idea that light could be emitted only in... Type: Conceptual 24. The transition in atomic hydrogen that gives the longest wavelength in the visible spectrum is n = 4 to n = 1. n = 3 to n = 1. n = 2 to n = 1. n = 4 to n = 2. → n = 3 to n = 2. Accessibility: Keyboard Navigation Difficulty: Hard Multiple Choice Question Topic: Atomic spectra and the Bohr model of the atom MC The transition in atomic hydrogen that gives... Type: Conceptual 25. A series of transitions in atomic hydrogen that produce emissions all in the ultraviolet portion of the spectrum are those ending in the level → n = 1. n = 2. n = 3. n = 4. n = 5. Accessibility: Keyboard Navigation Difficulty: Medium Multiple Choice Question Topic: Atomic spectra and the Bohr model of the atom MC A series of transitions in atomic hydrogen t... Type: Conceptual 26. If h = Planck's constant, the frequency of light emitted when an atom makes a transition is equal to the energy of revolution of the electron in its lowest energy orbit divided by h. the energy gained by the electron divided by h. → the energy lost by the electron divided by h. the energy of revolution of the electron in its highest energy orbit divided by h. Page 5 of 7 Accessibility: Keyboard Navigation Difficulty: Medium Multiple Choice Question Topic: Atomic spectra and the Bohr model of the atom MC If h = Planck's constant, the frequency of light emitted... Type: Conceptual 27. If h = Planck's constant, the de Broglie wavelength of a particle of linear momentum p and kinetic energy KE is given by the following formula: h/KE h·p KE/h → h/p p/h Accessibility: Keyboard Navigation Difficulty: Medium Multiple Choice Question Topic: Atomic spectra and the Bohr model of the atom MC If h = Planck's constant, the de Broglie w... Type: Conceptual 28. Which of the following individuals did not directly contribute to quantum theory? Heisenberg → Roentgen Schrödinger Planck Einstein Accessibility: Keyboard Navigation Difficulty: Hard Topic: Particle waves and quantum mechanics Multiple Choice Question Type: Conceptual MC Which of the following individuals did not d... Type: Definition 29. The helium atom has one more electron than hydrogen. The chemical properties differ because helium and hydrogen are equally reactive, since chemical bonding has nothing to do with the number of electrons. is more reactive, since it has two electrons that can form chemical bonds. → is much less reactive, since its two electrons form a stable closed shell. has neutrons in the nucleus. Multiple Choice Question MC The helium atom has one more electron than h... 30. Strong x-ray beams can be produced when gamma rays move through a magnetic field. alpha rays pass through a thin metal foil. beta rays are absorbed by bones. → cathode rays strike a metal anode. Accessibility: Keyboard Navigation Difficulty: Easy Topic: The existence of atoms: Evidence from chemistry Type: Conceptual Accessibility: Keyboard Navigation Difficulty: Hard Multiple Choice Question Topic: Cathode rays, electrons, and X-rays MC Strong x-ray beams can be produced when Type: Conceptual 31. Some substances emit radiation without any need to expose the material to other energy sources. We call these substances → naturally radioactive. noble gases. rotationally symmetric. thermal equilibrium. Accessibility: Keyboard Navigation Difficulty: Easy Topic: radioactivity and the discovery of the nucleus Multiple Choice Question Type: Conceptual MC Some substances emit radiation without any n... Type: Definition 32. According to quantum mechanics, people should act like waves, too. The reason we do not exhibit wave properties is that our wavelengths are too small to observe. The reason the wavelengths of people are so small is that when finding the wavelength → Planck's constant is small and people masses are much larger than that. Planck's constant is small and people move slowly. Planck's constant is small and the mass of a person isn't very important. Planck's constant is small and people move very fast. Multiple Choice Question MC According to quantum mechanics, people shoul... Accessibility: Keyboard Navigation Difficulty: Easy Topic: Particle waves and quantum mechanics Type: Conceptual Page 6 of 7 33. According to the Bohr model of the hydrogen atom, electrons cannot get closer to the nucleus than a specific distance because electrons are repelled by the nucleus. electrons lack the energy to get close to the nucleus. → electrons must have an angular momentum in their orbits that is not equal to zero. when electrons get to the lowest possible orbit, they run out of photons to radiate. Multiple Choice Question MC According to the Bohr model of the hydrogen ... 34. Alpha rays are de Broglie waves. → helium atoms stripped of their electrons. a form of electromagnetic radiation. fast-moving electrons. Accessibility: Keyboard Navigation Difficulty: Medium Topic: Atomic spectra and the Bohr model of the atom Type: Conceptual Accessibility: Keyboard Navigation Difficulty: Easy Topic: radioactivity and the discovery of the nucleus Multiple Choice Question Type: Conceptual MC Alpha rays are Type: Definition 35. One of the patterns that shows up nicely in the periodic table is that similar chemical properties correlate to the mass of each element on a row. make great batteries, if you choose a metal from two separate rows. exist on each diagonal, starting with hydrogen, then lithium, and so forth. → are displayed by elements in the same column. Accessibility: Keyboard Navigation Difficulty: Easy Multiple Choice Question Topic: The existence of atoms: Evidence from chemistry MC One of the patterns that shows up nicely in ... Type: Conceptual 36. When an atom of sodium in the surface of the sun has two electrons removed, then it has a negative charge. → it is a positive ion susceptible to acceleration in solar magnetic fields. it is a negatively charged rubidium atom. it becomes aluminum. Multiple Choice Question MC When an atom of sodium in the surface of the... 37. The energy of a photon is proportional to its wavelength. its polarization. → its frequency. its mass. Multiple Choice Question MC The energy of a photon is proportional to 38. Helium has chemical properties similar to boron. hydrogen. lithium. → neon. Accessibility: Keyboard Navigation Difficulty: Easy Topic: radioactivity and the discovery of the nucleus Type: Conceptual Accessibility: Keyboard Navigation Difficulty: Easy Topic: Cathode rays, electrons, and X-rays Type: Conceptual Accessibility: Keyboard Navigation Difficulty: Easy Multiple Choice Question Topic: The existence of atoms: Evidence from chemistry MC Helium has chemical properties similar to Type: Conceptual 39. The form of radiation from naturally radioactive uranium that has the largest mass is _____________ rays. alpha Difficulty: Easy Fill-in-the-Blank Question Topic: radioactivity and the discovery of the nucleus FB Radiation from naturally radioactive uranium... Type: Conceptual 40. The energy of a photon is calculated from the product of the constant h times the ________________. frequency Page 7 of 7 Fill-in-the-Blank Question FB The energy of a photon is calculated from th... Difficulty: Easy Topic: Cathode rays, electrons, and X-rays Type: Conceptual 41. In the Bohr model of the hydrogen atom the non-radiating orbits are determined by quantizing the _______________ (physical quantity). angular momentum Difficulty: Medium Fill-in-the-Blank Question Topic: Atomic spectra and the Bohr model of the atom FB In the Bohr model of the hydrogen atom the n... Type: Conceptual 42. The Bohr condition for determining the stable orbits in hydrogen can be explained in terms of ___________________ for the electron (two words). standing waves Difficulty: Hard Fill-in-the-Blank Question Topic: Atomic spectra and the Bohr model of the atom FB The Bohr condition for determining the stabl... Type: Conceptual 43. The Balmer series of spectral lines corresponds to transitions ending in a state of quantum number n = ____________. 2 Difficulty: Medium Fill-in-the-Blank Question Topic: Atomic spectra and the Bohr model of the atom FB The Balmer series of spectral lines correspo... Type: Conceptual 44. According to Heisenberg's principle, if one attempts to make a precise measurement of the linear momentum of a particle, he/she will get a large uncertainty in the determination of the ________ of the particle. position Fill-in-the-Blank Question FB According to Heisenberg's principle, if one... 45. Cathode rays and ___________ are both streams of electrons. Difficulty: Easy Topic: Particle waves and quantum mechanics Type: Conceptual beta rays Difficulty: Medium Fill-in-the-Blank Question Topic: Cathode rays, electrons, and X-rays FB Cathode rays and ___________ are both stream... Type: Conceptual 46. The electron was discovered by ________________ (one name) in his study of ____________________ (two words). Thomson, cathode rays Fill-in-the-Blank Question FB The electron was discovered by _____________... 47. X-rays are ___________ waves of _________ wavelength. Difficulty: Medium Topic: Cathode rays, electrons, and X-rays Type: Conceptual Type: Definition electromagnetic, short Fill-in-the-Blank Question FB X-rays are ___________ waves of _________ wa... Difficulty: Medium Topic: Cathode rays, electrons, and X-rays Type: Conceptual Type: Definition