CEM 141 MSU Exam 1 Questions and
Answers (Solved Papers)
The statement "If I add cold milk to hot coffee the
temperature will decrease," is a? - Correct Answers
✅Claim, always include an explanation and reasoning to the
claim.
Scientific Model - Correct Answers ✅Models are used to
make testable predictions
How much is a picometer? - Correct Answers ✅0.1 x 10^-
12 meters
Atomic Force Microscopy/ Scanning Tunneling Microscopy -
Correct Answers ✅Microscopes that now allows us to view
atoms.
Leaves are green in the summer because? - Correct
Answers ✅A plant's leaves are green in the summer
because they contain chlorophyll. Chlorophyll is a natural
pigment that absorbs all wavelengths in the visible spectrum
except green.
How many naturally occurring elements exist? - Correct
Answers ✅91
What was Dalton's Atomic theory? (1808) - Correct Answers
✅- Elements are composed of small particles called Atoms.
, CEM 141 MSU Exam 1 Questions and
Answers (Solved Papers)
- Atoms of a given element are different from atoms of other
elements.
-Chemical reactions happen when atoms are rearranged.
- Compounds contain 2 or more elements.
What was J.J. Thomson's experiment, and what did he
discover? - Correct Answers ✅Using a Cathode Ray Tube,
he noticed that particles emerged to the cathode disk, and
moved to another, the anode. These particles could be
deflected by electrical fields that would indicate that they
would be negatively charged. They were also deflected by
magnetic fields, which showed the particles carried the
charge as the ray was bent. The most important observation
was that the type of cathode used did not matter, as these
particles were still emitted. Therefore, Thomson deduced that
the particles were universal and were in fact negatively
charged components of the atom. (The Electron)
What was Ernest Rutherford's experiment, what did he
discover? - Correct Answers ✅Ernest Rutherford fired Alpha
particles (Hydrogen atoms) at a thin sheet of gold foil. Had
Thomson's theory been right about the plum pudding model,
then the atoms should have all passed right through the
sheet with no exceptions. However, a small ratio of these
particles were deflected. With this information, Rutherford
figured there was a small dense nucleus in the atom and that
most of the atom was empty space.
Answers (Solved Papers)
The statement "If I add cold milk to hot coffee the
temperature will decrease," is a? - Correct Answers
✅Claim, always include an explanation and reasoning to the
claim.
Scientific Model - Correct Answers ✅Models are used to
make testable predictions
How much is a picometer? - Correct Answers ✅0.1 x 10^-
12 meters
Atomic Force Microscopy/ Scanning Tunneling Microscopy -
Correct Answers ✅Microscopes that now allows us to view
atoms.
Leaves are green in the summer because? - Correct
Answers ✅A plant's leaves are green in the summer
because they contain chlorophyll. Chlorophyll is a natural
pigment that absorbs all wavelengths in the visible spectrum
except green.
How many naturally occurring elements exist? - Correct
Answers ✅91
What was Dalton's Atomic theory? (1808) - Correct Answers
✅- Elements are composed of small particles called Atoms.
, CEM 141 MSU Exam 1 Questions and
Answers (Solved Papers)
- Atoms of a given element are different from atoms of other
elements.
-Chemical reactions happen when atoms are rearranged.
- Compounds contain 2 or more elements.
What was J.J. Thomson's experiment, and what did he
discover? - Correct Answers ✅Using a Cathode Ray Tube,
he noticed that particles emerged to the cathode disk, and
moved to another, the anode. These particles could be
deflected by electrical fields that would indicate that they
would be negatively charged. They were also deflected by
magnetic fields, which showed the particles carried the
charge as the ray was bent. The most important observation
was that the type of cathode used did not matter, as these
particles were still emitted. Therefore, Thomson deduced that
the particles were universal and were in fact negatively
charged components of the atom. (The Electron)
What was Ernest Rutherford's experiment, what did he
discover? - Correct Answers ✅Ernest Rutherford fired Alpha
particles (Hydrogen atoms) at a thin sheet of gold foil. Had
Thomson's theory been right about the plum pudding model,
then the atoms should have all passed right through the
sheet with no exceptions. However, a small ratio of these
particles were deflected. With this information, Rutherford
figured there was a small dense nucleus in the atom and that
most of the atom was empty space.
