Chemistry: Matter and Change

Section 2: The Atom and Subatomic Particles

Self Check Quizzes

1
What can you conclude from the deflection of a cathode ray in a magnetic field?

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A)The ray must be composed of charged particles.
B)The ray must be composed of iron.
C)The ray must have a positive charge.
D)The ray must need to travel in a vacuum.
2
What properties did Rutherford use in the design of the gold foil experiment?

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A)alpha particle's negative charge and random distribution of protons
B)alpha particle's negative charge and gold foil's positive charge
C)alpha particle's positive charge and electron's negative charge
D)positively charged electrons distributed in a uniform negative charge
3
Which of the following particles has a mass that is almost the same as the mass of a proton?
A)neutron
B)electron
C)positron
D)beta particle
4
Which scientist determined that almost all of an atom's mass of is located in its nucleus?
A)Dalton
B)Democritus
C)Rutherford
D)Thomson
5
In the plum pudding model of the atom, where is most of the mass of the atom?

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A)in the electrons
B)in the matter between the electrons
C)in the nucleus
D)in the protons
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