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Early Ideas Of The Atom
Test Description: Answer the review questions and fill out your study guide.
Instructions: Answer all questions to get your test result.
1) J.J. Thompson, a British physicist, was the first to identify the
A
neutron
B
proton
C
electron
D
atomic theory
2) Using his observations, Dalton developed a theory that
A
Different elements have different electron configurations
B
Different elements have different masses and sizes
C
Different elements have different electrical charges
D
Different elements have different subatomic particles
3) Dalton was one of the first scientists to experimentally prove that
A
the atom is composed of smaller pieces
B
the nucleus and the electron have different electrical charges
C
most of the atom is made of empty space
D
the chemical and physical properties of an element correlate and its mass and size
4) Thomson was the first scientist to experimentally question
A
the existence of positive and negative particles within the atom
B
the existence of a nucleus within the atom
C
the existence of the atom
D
the existence of neutrons
5) Thomson's experiments were significant in that they questioned
A
whether the atom could be broken up into smaller units
B
whether matter is made up of atoms
C
whether the atom has a positive or negative charge
D
whether atoms will form compounds with other atoms
6) Rutherford's experiment showed that some substances allowed alpha particles to pass through them ______ frequently. He theorized this happened because the nuclei were ___.
A
less, smaller
B
more, the same size
C
more, smaller
D
less, the same size
7) Rutherford's experiment conflicted with Thompson's model because it showed that
A
the atoms contains positively and negatively charged particles.
B
the atom is composed of mostly empty space
C
the atom is full of a positively charged substance
D
the atom contains a nucleus with protons and neutrons.
8) J.J. Thomson and Ernest Rutherford would agree that
A
protons and electrons have different charges
B
protons and electrons exist in the nucleus
C
neutrons exist in the nucleus
D
atoms have more protons and electrons
9) From our current knowledge of the atom we can conclude that
A
Atoms of an element can have different numbers of protons
B
Dalton was correct
C
Atoms are divisible
D
Atoms of the same element are not always identical but all have the same mass
10) Which of the following was not a part of Dalton's atomic theory?
A
Atoms are always moving
B
Atoms of the same element have similar mass and size
C
All elements are made of atoms
D
Atoms combine in simple ratios
*select an answer for all questions
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