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Models Of Atoms
Test Description: Glenco 6th science Va
Instructions: Answer all questions to get your test result.
1) A(n) __________ is a substance that cannot be broken down into simpler substances.
A
compound
B
mixture
C
element
D
metal
2) What nineteenth century scientist combined the idea of elements with the Greek theory of the atom?
A
J.J. Thomson
B
John Dalton
C
Isaac Newton
D
Ernest Rutherford
3) A piece of metal that can conduct electricity is called a(n) __________.
A
electrode
B
alpha particle
C
electron
D
foil
4) How did J.J. Thomson know that the particles in the cathode-ray tube were negatively charged?
A
The particles were spread evenly throughout the tube.
B
These particles were attracted to the positively charged anode, and he knew that opposite charges attract each other.
C
These particles were attracted to the negatively charged cathode, and he knew that like charges attract each other.
D
Some of the particles went veering off at large angles to the tube.
5) The small, negatively charged particles discovered by J.J. Thomson are called __________.
A
electrons
B
neutrons
C
protons
D
alpha particles
6) Which of the following best describes Thomson's model of the atom?
A
electron cloud
B
solid ball the same throughout
C
small ball within a large shell containing empty space
D
ball of raisin-cookie dough with raisins representing electrons
7) Ernest Rutherford experimented with alpha particles and thin gold foil to find out __________.
A
if Thomson's model of the atom was correct
B
Dalton's model of the atom was correct
C
the size of the electron orbit
D
the speed at which alpha particles travel
8) Where did Rutherford propose that the positive charge in an atom was located?
A
moving in predictable orbits around the electrons
B
in the outermost energy level
C
in the center
D
spread evenly throughout
9) What particle in an atom is electrically neutral?
A
alpha particle
B
electron
C
neutron
D
proton
10) Which of the following models of the atom reflects the unpredictable motion of the electron?
A
ball of raisin-cookie dough with raisins representing electrons
B
small ball within a large shell containing empty space
C
electron cloud
D
solid ball the same throughout
*select an answer for all questions
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