CEM 141 EXAM 1- MSU
MSU CEM 141 REAL EXAM LATEST 2026-2027
FINAL EXAM WITH QUESTIONS AND CORRECT
DETAILED CORRECT ANSWERS ALREADY
GRADED A+
What is matter composed of?
Atoms that are mostly empty space.
How can matter exist in terms of physics?
Matter can exist as either a particle or a wave.
What are emergent properties?
Properties that arise when atoms and molecules interact, which
are different from the sum of the reactants.
What can a collection of cells produce?
A self-conscious entity that thinks it is more than just a collection
of cells.
What is the first step in the scientific method?
Ask questions.
What is the purpose of designing experiments in scientific
inquiry?
To gather and analyze data and evidence.
What must claims in science be based on?
Data and evidence gathered from experiments.
What is a scientific question?
A question that can be answered through experimentation and
observation.
What is the role of a control group in an experiment?
To provide a baseline for comparison with the experimental
group.
What is required for a claim to be scientifically valid?
It must be supported by evidence.
What are the three parts of a scientific explanation?
,Claim, evidence, and reasoning.
What distinguishes a scientific theory from a law?
A theory explains why phenomena occur, while a law describes
what happens.
What is an atom?
The smallest unit of an element, composed of protons, electrons,
and neutrons.
What is the difference between an element and a compound?
An element consists of one type of atom, while a compound is
made of two or more types of atoms chemically bonded.
What is Dalton's Atomic Theory?
A theory stating that elements are composed of indivisible atoms
and that chemical reactions involve the rearrangement of atoms.
What is the evidence for the existence of atoms?
Atomic Force Microscopy (AFM) and Scanning Tunneling
Microscopy (STM) provide images at the atomic level.
What is the significance of the atomic number?
It is unique to each element and defines the number of protons in
an atom.
What happens to coffee when cold milk is added?
The coffee cools down due to the collision of higher kinetic energy
coffee molecules with lower kinetic energy milk molecules.
What is a scientific model?
A representation that helps predict outcomes and explain
phenomena, which can be a drawing, graph, diagram, or
equation.
What is the relationship between thermal energy and atomic
motion?
Thermal energy keeps atoms in constant motion.
What is the role of evidence in scientific claims?
Evidence must support claims to validate them scientifically.
What distinguishes one element from another?
Each element has a unique number of protons, known as the
atomic number.
What is the difference between an atom and a molecule?
, An atom is the smallest particle of an element, while a molecule
consists of two or more atoms chemically bonded together.
What is the significance of the Greeks' contribution to atomic
theory?
They proposed the idea of atoms based on philosophy rather than
experimental evidence.
What is a claim in the context of scientific inquiry?
A statement that asserts a particular outcome or explanation
based on evidence.
What is the importance of replicability in scientific
experiments?
Experiments must be replicable to be considered valid science.
What happens when a high voltage is applied to a cathode?
The cathode emits particles that move toward the anode.
What is the mass of the particles emitted from the cathode
compared to an atom?
The mass of the particles is about 1/2000 that of an atom.
What evidence from Thomson's experiment indicates that
atoms contain electrons?
The particles were attracted to the positive electrode, indicating
they have a negative charge.
What is an alpha particle?
An alpha particle consists of 2 protons and 2 neutrons; it is the
nucleus of a helium atom.
What did Rutherford's gold foil experiment reveal about
atomic structure?
It showed that atoms are mostly empty space and that there is a
nucleus at the center.
What is the planetary model of the atom?
In this model, electrons orbit the nucleus, which contains protons
and neutrons.
What are neutrons and why are they harder to detect?
Neutrons have mass but no electrical charge and reside in the
nucleus.
MSU CEM 141 REAL EXAM LATEST 2026-2027
FINAL EXAM WITH QUESTIONS AND CORRECT
DETAILED CORRECT ANSWERS ALREADY
GRADED A+
What is matter composed of?
Atoms that are mostly empty space.
How can matter exist in terms of physics?
Matter can exist as either a particle or a wave.
What are emergent properties?
Properties that arise when atoms and molecules interact, which
are different from the sum of the reactants.
What can a collection of cells produce?
A self-conscious entity that thinks it is more than just a collection
of cells.
What is the first step in the scientific method?
Ask questions.
What is the purpose of designing experiments in scientific
inquiry?
To gather and analyze data and evidence.
What must claims in science be based on?
Data and evidence gathered from experiments.
What is a scientific question?
A question that can be answered through experimentation and
observation.
What is the role of a control group in an experiment?
To provide a baseline for comparison with the experimental
group.
What is required for a claim to be scientifically valid?
It must be supported by evidence.
What are the three parts of a scientific explanation?
,Claim, evidence, and reasoning.
What distinguishes a scientific theory from a law?
A theory explains why phenomena occur, while a law describes
what happens.
What is an atom?
The smallest unit of an element, composed of protons, electrons,
and neutrons.
What is the difference between an element and a compound?
An element consists of one type of atom, while a compound is
made of two or more types of atoms chemically bonded.
What is Dalton's Atomic Theory?
A theory stating that elements are composed of indivisible atoms
and that chemical reactions involve the rearrangement of atoms.
What is the evidence for the existence of atoms?
Atomic Force Microscopy (AFM) and Scanning Tunneling
Microscopy (STM) provide images at the atomic level.
What is the significance of the atomic number?
It is unique to each element and defines the number of protons in
an atom.
What happens to coffee when cold milk is added?
The coffee cools down due to the collision of higher kinetic energy
coffee molecules with lower kinetic energy milk molecules.
What is a scientific model?
A representation that helps predict outcomes and explain
phenomena, which can be a drawing, graph, diagram, or
equation.
What is the relationship between thermal energy and atomic
motion?
Thermal energy keeps atoms in constant motion.
What is the role of evidence in scientific claims?
Evidence must support claims to validate them scientifically.
What distinguishes one element from another?
Each element has a unique number of protons, known as the
atomic number.
What is the difference between an atom and a molecule?
, An atom is the smallest particle of an element, while a molecule
consists of two or more atoms chemically bonded together.
What is the significance of the Greeks' contribution to atomic
theory?
They proposed the idea of atoms based on philosophy rather than
experimental evidence.
What is a claim in the context of scientific inquiry?
A statement that asserts a particular outcome or explanation
based on evidence.
What is the importance of replicability in scientific
experiments?
Experiments must be replicable to be considered valid science.
What happens when a high voltage is applied to a cathode?
The cathode emits particles that move toward the anode.
What is the mass of the particles emitted from the cathode
compared to an atom?
The mass of the particles is about 1/2000 that of an atom.
What evidence from Thomson's experiment indicates that
atoms contain electrons?
The particles were attracted to the positive electrode, indicating
they have a negative charge.
What is an alpha particle?
An alpha particle consists of 2 protons and 2 neutrons; it is the
nucleus of a helium atom.
What did Rutherford's gold foil experiment reveal about
atomic structure?
It showed that atoms are mostly empty space and that there is a
nucleus at the center.
What is the planetary model of the atom?
In this model, electrons orbit the nucleus, which contains protons
and neutrons.
What are neutrons and why are they harder to detect?
Neutrons have mass but no electrical charge and reside in the
nucleus.
