MSU CEM 141 Exam 1 Prep Newest Actual Exam
With Complete 60 Questions And Correct Detailed
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Michigan State University
What was Ernest Rutherford's experiment, what did he discover?
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.
What is the difference between Law and Theory?
A law describes - tells you what happens
A theory explains - tells you why it happens
How big is an atom (H)?
About 0.1 nanometer (0.1 x 10-9m)
, Where did the idea of atoms come from?
The Greeks
Atoms
The smallest unit of an element
What is the evidence from Thomson's experiment that all atoms contain
electrons?
The particles are identical regardless of the identity of the cathode(where they
were emitted from).
What is an alpha particle?
Has 2 protons and 2 neutrons. It is the nucleus of a Helium atom.
Coulomb's Law
Negative and positive charges attract and like charges repel.
4 Types of Forces
Gravitational, Electromagnetic, Strong Nuclear, Weak Nuclear
With Complete 60 Questions And Correct Detailed
Answers (Verified Answers) |Already Graded A+
Michigan State University
What was Ernest Rutherford's experiment, what did he discover?
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.
What is the difference between Law and Theory?
A law describes - tells you what happens
A theory explains - tells you why it happens
How big is an atom (H)?
About 0.1 nanometer (0.1 x 10-9m)
, Where did the idea of atoms come from?
The Greeks
Atoms
The smallest unit of an element
What is the evidence from Thomson's experiment that all atoms contain
electrons?
The particles are identical regardless of the identity of the cathode(where they
were emitted from).
What is an alpha particle?
Has 2 protons and 2 neutrons. It is the nucleus of a Helium atom.
Coulomb's Law
Negative and positive charges attract and like charges repel.
4 Types of Forces
Gravitational, Electromagnetic, Strong Nuclear, Weak Nuclear
