Atomic Theory

Question 1

Which statement describes one feature of Rutherford’s model of the atom?

Revolt · Accepted Answer

The atom is mostly empty space.

Question 2

What new characteristic did John Dalton add to the model of the atom?

Revolt · Accepted Answer

An atom can join with other kinds of atoms.

Question 3

Rutherford tracked the motion of tiny, positively charged particles shot through a thin sheet of gold foil. Some particles traveled in a straight line and some were deflected at different angles.Which statement best describes what Rutherford concluded from the motion of the particles?

Revolt · Accepted Answer

Some particles traveled through empty parts of the atom and some particles were deflected by small areas of high-density positive charge in atoms.

Question 4

Scientists have changed the model of the atom as they have gathered new evidence. One of the atomic models is shown below.

Revolt · Accepted Answer

A few of the positive particles aimed at a gold foil seemed to bounce back.

Question 5

The atomic models after Dalton’s time included ideas about the atomic structure.Which atomic model that shows the atomic structure is missing from this set?

Revolt · Accepted Answer

Schrödinger’s model

Question 6

Scientists have changed the model of the atom as they have gathered new evidence. One of the atomic models is shown below.What experimental evidence led scientists to change from the previous model to this one?

Revolt · Accepted Answer

The colors of light emitted from heated atoms had very specific energies.

Question 7

Why did Thomson’s results from experimenting with cathode rays cause a big change in scientific thought about atoms?

Revolt · Accepted Answer

His results gave the first evidence that atoms were made up of smaller particles.

Question 8

Oppositely charged objects attract each other. This attraction holds electrons in atoms and holds atoms to one another in many compounds. However, Ernest Rutherford’s model of the atom failed to explain why electrons were not pulled into the atomic nucleus by this attraction.What change to the atomic model helped solve the problem seen in Rutherford’s model?

Revolt · Accepted Answer

Bohr’s work with atomic spectra led him to say that the electrons were limited to existing in certain energy levels, like standing on the rungs of a ladder.

Question 9

Which scientist developed the first model of the atom that proposed the structure of the inside of an atom?

Revolt · Accepted Answer

Thomson

Question 10

Which statement belongs to Dalton’s atomic theory?

Revolt · Accepted Answer

Atoms cannot be created or destroyed.

Atomic Theory Answers

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