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History Of Atomic Theory
Test Description: Test Review
Instructions: Answer all questions to get your test result.
1) Which scientist offered proof that atoms exist?
A
Aristosle
B
Issac Newton
C
John Dalton
D
Democritus
2) Which of the following models shows how unpredictable electrons are?
A
The electron cloud shows the movement of electrons
B
A solid ball with electrons interspersed throughout
C
The atom is a solid, uniform ball
D
A small ball in a large empty electron shell
3) Dalton's experiments advanced our understanding of the atom without
A
examining the ratios of elements involved in chemical reactions
B
discovering the internal structure of the atom
C
testing hypothesis
D
carefully observing and measuring events
4) In Rutherford's gold foil experiment the alpha particles pass through which part of the atom?
A
the electron cloud
B
the proton shield
C
the valence electron shell
D
the nucleus
5) An electron enters_______ when it has absorbed energy and moved to a higher energy level.
A
an excited state
B
a ground state
C
an orbit
D
a quantum level
6) British physicist J.J. Thomson was the first to identify the
A
neutron
B
electron
C
atomic theory
D
proton
7) The building blocks of matter are
A
as of yet indiscovered
B
electrons
C
none of these
D
atoms and molecules
8) The modern atomic theory has been updated over the years as new observations of the atom have been made. What is likely to happen in the future?
A
There's just no way to tell what might happen.
B
We will find out that the entire model is wrong.
C
We will find out that the entire model is finally all figured out.
D
It will be updated as new observations are made.
9) Scientist have developed the Atomic Theory over a period of hundreds of years. What will help us further the development?
A
decreasing the number of atoms in the universe
B
decreasing the ability of technology, like microscopes, to see even smaller particles
C
increasing the number of atoms in the universe
D
increasing the ability of technology, like microscopes, to see even smaller particles
10) The modern atomic model is also sometimes called the_____ model.
A
plum pudding
B
Bohr
C
quantum mechanics
D
solar system
11) In Thomson's plum pudding model the mass of the atom is in the
A
nucleus
B
matter between the electrons
C
electrons
D
protons
12) This scientist published a detailed atomic theory in 1808 based on evidence he gathered through experiments with gases. His atomic theory laid the groundwork for later atomic models.
A
Neils Bohr
B
John Dalton
C
Ernest Rutherford
D
Democritus
*select an answer for all questions
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