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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.
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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
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→
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
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→
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.
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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
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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
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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