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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.

Acompound Bmetal Celement Dmixture

2) What nineteenth century scientist combined the idea of elements with the Greek theory of the atom?

AJohn Dalton BErnest Rutherford CJ.J. Thomson DIsaac Newton

3) A piece of metal that can conduct electricity is called a(n) __________.

Aelectron Bfoil Calpha particle Delectrode

4) How did J.J. Thomson know that the particles in the cathode-ray tube were negatively charged?

AThese particles were attracted to the positively charged anode, and he knew that opposite charges attract each other. BThe particles were spread evenly throughout the tube. CThese particles were attracted to the negatively charged cathode, and he knew that like charges attract each other. DSome 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 __________.

Aprotons Balpha particles Celectrons Dneutrons

6) Which of the following best describes Thomson's model of the atom?

Asmall ball within a large shell containing empty space Bball of raisin-cookie dough with raisins representing electrons Csolid ball the same throughout Delectron cloud

7) Ernest Rutherford experimented with alpha particles and thin gold foil to find out __________.

Athe speed at which alpha particles travel Bthe size of the electron orbit Cif Thomson's model of the atom was correct DDalton's model of the atom was correct

8) Where did Rutherford propose that the positive charge in an atom was located?

Ain the center Bspread evenly throughout Cin the outermost energy level Dmoving in predictable orbits around the electrons

9) What particle in an atom is electrically neutral?

Aalpha particle Belectron Cneutron Dproton

10) Which of the following models of the atom reflects the unpredictable motion of the electron?

Aelectron cloud Bsmall ball within a large shell containing empty space Csolid ball the same throughout Dball of raisin-cookie dough with raisins representing electrons

*select an answer for all questions

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