Chapter 4. Section 1.0

Democritus believed that matter was made up of _______

• earth

• fire

• atoms

• water

Aristotle said that ________ cannot exist.

• atoms

• empty space

• air

• fire

Which of the following parts of John Dalton's atomic theory were not correct? Remember that the atom is made of: electrons, protons and neutrons.

• matter is composed of atoms

• atoms are indivisible

• atoms of one element differ from atoms of another

• atoms combine to form compounds

John Dalton's ideas about atoms were similar to those of __________.

• Aristotle

• Platon

• Socrates

• Democritus

What can you conclude from the deflection of a cathode ray in a magnetic field?

• The ray must be composed of charged particles.

• The ray must be composed of iron.

• The ray must have a positive charge.

• The ray must need to travel in a vacuum. The ray must need to travel in a vacuum.

What properties did Rutherford use in the design of the gold foil experiment?

• alpha particle's negative charge and random distribution of protons

• alpha particle's negative charge and gold foil's neutral charge

• alpha particle's negative charge and gold foil's positive charge

• positively charged electrons distributed in a uniform negative charge

Which of the following particles has a mass that is almost the same as the mass of a proton?

• Neutron

• Electron

• Positron

• Beta particle

Which scientist determined that almost all of an atom's mass of is located in its nucleus?

• Daton

• Democritus

• Rutherford

• Thomson

In the plum pudding model of the atom, where is most of the mass of the atom?

• in the electrons

• in the matter between the electrons

• in the nucleus

• in the protons