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Atoms Answers

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

A
The atom is mostly empty space.
B
The atom cannot be divided into smaller particles.
C
Electron clouds are regions where electrons are likely to be found.
D
The electrons are located within the positive material of the nucleus.
2
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A cathode ray tube is made of glass with a small amount of some kind of gas in it. It has metal electrodes at each end to pick up an electric current. The electrodes are named "positive” and "negative."What are one of the main uses of this device ?

A
to speed up the flow of current flowing through a wire
B
to examine a beam of charged particles
C
to magnetize different atoms within a space
D
to change the strength of a proton within an atom
3

Which statement belongs to Dalton’s atomic theory?

A
Atoms have a massive, positively charged center.
B
Atoms cannot be created or destroyed.
C
Atoms can be broken down into smaller pieces.
D
Electrons are located in energy levels outside of the nucleus.
4

The plum pudding model of the atom states that

A
each atom has an overall negative charge.
B
each atom has a dense, positively charged center.
C
an atom is a solid, indivisible sphere that makes up all matter.
D
an atom is made up of electrons in a sea of positive charges.
5

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?

A
Some particles traveled through empty parts of the atoms and some particles were deflected by neutrons.
B
Some particles traveled through empty parts of the atom and some particles were deflected by electrons.
C
Some particles traveled through empty parts of the atom and some particles were deflected by the orbits of atoms.
D
Some particles traveled through empty parts of the atom and some particles were deflected by small areas of high-density positive charge in atoms.
6

What did Bohr’s model of the atom include that Rutherford’s model did not have?

A
a nucleus
B
energy levels
C
electron clouds
D
smaller particles
7

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?

Question illustration
A
Niels Bohr’s model
B
Schrödinger’s model
C
Rutherford’s model
D
Thomson’s model
8

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

Question illustration
A
A few of the positive particles aimed at a gold foil seemed to bounce back.
B
The colors of light emitted from heated atoms had very specific energies.
C
Experiments with water vapor showed that elements combine in specific proportions.
D
Cathode rays were bent in the same way whenever a magnet was brought near them.
9

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

Question illustration
A
A few of the positive particles aimed at a gold foil seemed to bounce back.
B
The colors of light emitted from heated atoms had very specific energies.
C
Equations were used to identify regions around the nucleus where electrons would likely be.
D
Cathode rays were bent in the same way whenever a magnet was brought near them.
10

The charged particles in the beams that Thomson studied came from atoms. As these particles moved away from their original atoms, they formed a visible beam. The current model of the atom includes protons, neutrons, and electrons.What is the best use of an atomic model to explain the charge of the particles in Thomson’s beams?

A
An atom’s negative particles are surrounded by positive matter, so the positive particles are easier to remove.
B
An atom’s positive particles are surrounded by negative matter, so the negative particles are easier to remove.
C
An atom’s smaller negative particles are at a distance from the central positive particles, so the negative particles are easier to remove.
D
An atom’s larger positive particles are at a distance from the central negative particles, so the positive particles are easier to remove.

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