Models of the Atom Flashcards
What is the basic unit of matter?
The atom.
True or False: The Rutherford model of the atom proposed that electrons orbit the nucleus in fixed paths.
False.
Fill in the blank: The __________ model describes the atom as having a dense nucleus surrounded by a cloud of electrons.
quantum.
Who proposed the plum pudding model of the atom?
J.J. Thomson.
What did the gold foil experiment demonstrate?
That atoms have a small, dense nucleus.
Multiple Choice: Which atomic model introduced the concept of quantized energy levels? A) Dalton’s model B) Rutherford’s model C) Bohr’s model D) Plum pudding model
C) Bohr’s model.
What is the primary limitation of the Rutherford model?
It could not explain the stability of electron orbits.
True or False: The quantum mechanical model of the atom allows for the prediction of electron positions with certainty.
False.
What does the term ‘orbital’ refer to in atomic theory?
A region in an atom where there is a high probability of finding an electron.
Who is credited with developing the first modern atomic theory?
John Dalton.
