CEM 141 MSU EXAM 1 QUESTIONS AND
ANSWERS LATEST 2025-2026 UPDATE
What is the difference between Law and Theory? - Answer-A law
describes - tells you what happens
A theory explains - tells you why it happens
How big is an atom (H)? - Answer-About 0.1 nanometer (0.1 x 10-9m)
Which is biggest? Atom, Molecule, Cell, or it depends? - Answer-
Where did the idea of atoms come from? - Answer-The Greeks
Atoms - Answer-The smallest unit of an element
What is the evidence from Thomson's experiment that all atoms contain
electrons? - Answer-The particles are identical regardless of the identity
of the cathode(where they were emitted from).
, What is an alpha particle? - Answer-Has 2 protons and 2 neutrons. It is
the nucleus of a Helium atom.
Coulomb's Law - Answer-Negative and positive charges attract and like
charges repel.
4 Types of Forces - Answer-Gravitational, Electromagnetic, Strong
Nuclear, Weak Nuclear
Gravitational Force - Answer-Responsible for attraction between
objects that have mass.
Electromagnetic Force - Answer-Responsible for attraction/repulsion
for objects that have an electric charge.
The statement "If I add cold milk to hot coffee the temperature will
decrease," is a? - Answer-Claim, always include an explanation and
reasoning to the claim.
Scientific Model - Answer-Models are used to make testable predictions
How much is a picometer? - Answer-0.1 x 10^-12 meters
Atomic Force Microscopy/ Scanning Tunneling Microscopy - Answer-
Microscopes that now allows us to view atoms.
ANSWERS LATEST 2025-2026 UPDATE
What is the difference between Law and Theory? - Answer-A law
describes - tells you what happens
A theory explains - tells you why it happens
How big is an atom (H)? - Answer-About 0.1 nanometer (0.1 x 10-9m)
Which is biggest? Atom, Molecule, Cell, or it depends? - Answer-
Where did the idea of atoms come from? - Answer-The Greeks
Atoms - Answer-The smallest unit of an element
What is the evidence from Thomson's experiment that all atoms contain
electrons? - Answer-The particles are identical regardless of the identity
of the cathode(where they were emitted from).
, What is an alpha particle? - Answer-Has 2 protons and 2 neutrons. It is
the nucleus of a Helium atom.
Coulomb's Law - Answer-Negative and positive charges attract and like
charges repel.
4 Types of Forces - Answer-Gravitational, Electromagnetic, Strong
Nuclear, Weak Nuclear
Gravitational Force - Answer-Responsible for attraction between
objects that have mass.
Electromagnetic Force - Answer-Responsible for attraction/repulsion
for objects that have an electric charge.
The statement "If I add cold milk to hot coffee the temperature will
decrease," is a? - Answer-Claim, always include an explanation and
reasoning to the claim.
Scientific Model - Answer-Models are used to make testable predictions
How much is a picometer? - Answer-0.1 x 10^-12 meters
Atomic Force Microscopy/ Scanning Tunneling Microscopy - Answer-
Microscopes that now allows us to view atoms.
