Elscores: Tuesday, 20 August 2024
Chemistry Cumulative Exam Review
Questions and Correct Answer
A stable atom that has a large nucleus most likely contains
(Atoms and the Atomic Theory)
✓ :-- A) more neutrons than protons
Which statement best describes the light that will cause emission of electrons from a given
metal through the photoelectric effect?
(Atoms and the Atomic Theory)
✓ :-- B) light with any intensity above a certain frequency
The atomic symbol mc025-1.jpg represents potassium-40 (K-40), a radioactive isotope that
has 19 protons and 21 neutrons. Which atomic symbol could represent an isotope that results
from the decay of K-40?
(Atoms and the Atomic Theory)
✓ :-- A) 40/18 AR
The table below gives the data that is needed to calculate the average atomic mass of element
B.
Isotope Atomic mass (amu) Relative abundance (%)
B-10 10.01 19.91
B-11 11.01 80.09
DO NOT COPY AND PASTE!!
, Elscores: Tuesday, 20 August 2024
Based on these data, what is the average atomic mass of element B?
(Atoms and the Atomic Theory)
✓ :-- C) 10.81
An electron in a hydrogen atom moves from level 3 to level 1. In a second hydrogen atom, an
electron drops from level 2 to level 1. Which statement describes the most likely result?
(Atoms and the Atomic Theory)
✓ :-- A) The first atom emits light with more energy.
Which diagram best illustrates the atomic model that Rutherford derived from his gold foil
experiment?
(Atoms and the Atomic Theory)
✓ :-- A
To explain the photoelectric effect, Albert Einstein linked the photoelectric effect to an idea
from which scientist?
(Atoms and the Atomic Theory)
✓ :-- C) Max Planck
A student writes the following statements about the relationship between mass defect and
nuclear binding energy.
DO NOT COPY AND PASTE!!
, Elscores: Tuesday, 20 August 2024
1. When an isotope's protons and neutrons come together to form a nuclide, a small amount
of mass is converted to energy.
2. An equivalent amount of energy must be added to the nuclide to split apart its protons and
neutrons.
3. Statement 1 describes the isotope's nuclear binding energy, and statement 2 describes the
isotope's mass defect.
Which statement is correct?
(Atoms and the Atomic Theory)
✓ :-- C) 1 and 2 only
In which isotope is the strong nuclear force not strong enough to balance electrostatic forces
between protons?
(Atoms and the Atomic Theory)
✓ :-- D) uranium-238
Which is a correct comparison between the modern quantum model and John Dalton's model
of the atom?
✓ :-- C) The modern model recognizes particles in the atom, whereas Dalton's model
does not.
What did J. J. Thomson observe when he applied electric voltage to a cathode ray tube in his
famous experiment?
(Atoms and the Atomic Theory)
DO NOT COPY AND PASTE!!
, Elscores: Tuesday, 20 August 2024
✓ :-- B) The glass opposite of the negative electrode started to glow.
The mass number of a chromium atom is 52 and it has 24 protons. How many neutrons does
this atom have?
(Atoms and the Atomic Theory)
✓ :-- B) 28
Which of these properties is the best one to use for identification of an element?
(Atoms and the Atomic Theory)
✓ :-- B) the number of protons in the atomic nucleus
Which scientist's law about the ratios of masses of elements in a compound did John Dalton's
work on the atomic structure help to explain?
(Atoms and the Atomic Theory)
✓ :-- D) Joseph Proust
Which is a component of John Dalton's atomic theory?
(Atoms and the Atomic Theory)
✓ :-- C) An atom is a small particle that cannot be broken down.
(Elements and the Periodic Table)
Which property would xenon most likely have?
✓ :-- A) It is stable
DO NOT COPY AND PASTE!!
Chemistry Cumulative Exam Review
Questions and Correct Answer
A stable atom that has a large nucleus most likely contains
(Atoms and the Atomic Theory)
✓ :-- A) more neutrons than protons
Which statement best describes the light that will cause emission of electrons from a given
metal through the photoelectric effect?
(Atoms and the Atomic Theory)
✓ :-- B) light with any intensity above a certain frequency
The atomic symbol mc025-1.jpg represents potassium-40 (K-40), a radioactive isotope that
has 19 protons and 21 neutrons. Which atomic symbol could represent an isotope that results
from the decay of K-40?
(Atoms and the Atomic Theory)
✓ :-- A) 40/18 AR
The table below gives the data that is needed to calculate the average atomic mass of element
B.
Isotope Atomic mass (amu) Relative abundance (%)
B-10 10.01 19.91
B-11 11.01 80.09
DO NOT COPY AND PASTE!!
, Elscores: Tuesday, 20 August 2024
Based on these data, what is the average atomic mass of element B?
(Atoms and the Atomic Theory)
✓ :-- C) 10.81
An electron in a hydrogen atom moves from level 3 to level 1. In a second hydrogen atom, an
electron drops from level 2 to level 1. Which statement describes the most likely result?
(Atoms and the Atomic Theory)
✓ :-- A) The first atom emits light with more energy.
Which diagram best illustrates the atomic model that Rutherford derived from his gold foil
experiment?
(Atoms and the Atomic Theory)
✓ :-- A
To explain the photoelectric effect, Albert Einstein linked the photoelectric effect to an idea
from which scientist?
(Atoms and the Atomic Theory)
✓ :-- C) Max Planck
A student writes the following statements about the relationship between mass defect and
nuclear binding energy.
DO NOT COPY AND PASTE!!
, Elscores: Tuesday, 20 August 2024
1. When an isotope's protons and neutrons come together to form a nuclide, a small amount
of mass is converted to energy.
2. An equivalent amount of energy must be added to the nuclide to split apart its protons and
neutrons.
3. Statement 1 describes the isotope's nuclear binding energy, and statement 2 describes the
isotope's mass defect.
Which statement is correct?
(Atoms and the Atomic Theory)
✓ :-- C) 1 and 2 only
In which isotope is the strong nuclear force not strong enough to balance electrostatic forces
between protons?
(Atoms and the Atomic Theory)
✓ :-- D) uranium-238
Which is a correct comparison between the modern quantum model and John Dalton's model
of the atom?
✓ :-- C) The modern model recognizes particles in the atom, whereas Dalton's model
does not.
What did J. J. Thomson observe when he applied electric voltage to a cathode ray tube in his
famous experiment?
(Atoms and the Atomic Theory)
DO NOT COPY AND PASTE!!
, Elscores: Tuesday, 20 August 2024
✓ :-- B) The glass opposite of the negative electrode started to glow.
The mass number of a chromium atom is 52 and it has 24 protons. How many neutrons does
this atom have?
(Atoms and the Atomic Theory)
✓ :-- B) 28
Which of these properties is the best one to use for identification of an element?
(Atoms and the Atomic Theory)
✓ :-- B) the number of protons in the atomic nucleus
Which scientist's law about the ratios of masses of elements in a compound did John Dalton's
work on the atomic structure help to explain?
(Atoms and the Atomic Theory)
✓ :-- D) Joseph Proust
Which is a component of John Dalton's atomic theory?
(Atoms and the Atomic Theory)
✓ :-- C) An atom is a small particle that cannot be broken down.
(Elements and the Periodic Table)
Which property would xenon most likely have?
✓ :-- A) It is stable
DO NOT COPY AND PASTE!!
