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Atomic Theory- Scientist Timeline
Test Description: Review questions
Instructions: Answer all questions to get your test result.
1) Who discovered the electron?
A
Rutherford
B
Goldstein
C
Thomson
D
Bohr
2) Who created a model of the atom with electrons moving around the nucleus in fixed orbits?
A
Bohr
B
Thomson
C
Rutherford
D
Democritus
3) Who did the gold foil experiment?
A
Chadwick
B
Mendeleev
C
Democritus
D
Rutherford
4) Who discovered that the proton had a positive charge?
A
Chadwick
B
Bohr
C
Dalton
D
Rutherford
5) Believed that the universe was made of tiny uncuttable particles
A
Mendeleev
B
Democritus
C
Dalton
D
Chadwick
6) Created the first periodic table.
A
Mendeleev
B
Rutherford
C
Bohr
D
Dalton
7) Greek philosopher
A
Democritus
B
Chadwick
C
Dalton
D
Thomson
8) Found the missing mass of the atom's nucleus
A
Chadwick
B
Mendeleev
C
Dalton
D
Democritus
9) Determined that the properties of elements are periodic (or in trends)
A
Heisenberg
B
Bohr
C
Chadwick
D
Mendeleev
10) Uncertainty principle (a particle's position, energy and time can never be precisely known)
A
Bohr
B
Dalton
C
Heisenberg
D
Chadwick
11) Discovered the neutron
A
Dalton
B
Rutherford
C
Chadwick
D
Heisenberg
12) Hypothesized that the atom was a tiny hard sphere
A
Rutherford
B
Thomson
C
Chadwick
D
Dalton
13) Discovered that the atom is mostly empty space
A
Democritus
B
Dalton
C
Chadwick
D
Rutherford
14) Believed that atoms of a given element are identical
A
Thomson
B
Dalton
C
Chadwick
D
Rutherford
15) Created the atomic theory
A
Dalton
B
Democritus
C
Rutherford
D
Chadwick
16) Use the cathode ray tube in his discovery
A
Thomson
B
Mendeleev
C
Heisenberg
D
Dalton
17) Created the plum pudding model of the atom.
A
Mendeleev
B
Chadwick
C
Dalton
D
Thomson
18) Worked with the Quantum Theory
A
Democritus
B
Thomson
C
Daltong
D
Heisenberg
*select an answer for all questions
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