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Module 2 Review
Test Description: Some basic questions based upon the information in module 2.
Instructions: Answer all questions to get your test result.
1) This atomic particle has a negative charge and very little mass.
A
electron
B
neutron
C
nucleus
D
proton
2) The nucleus of an atom contains which two particles?
A
protons and neutrons
B
electrons and neutrons
C
protons and electrons
D
quarks and protons
3) This particle is found in the nucleus and has a positive charge.
A
proton
B
electron
C
nucleus
D
neutron
4) The number of protons in a nucleus determines:
A
atomic mass
B
weighted average
C
mass number
D
atomic number
5) What caused the scientific community to accept Rutherford's atomic model?
A
Science explained the complete experiment
B
Rutherford recreated Thompson's experiment
C
Thompson approved Rutherford's experiment
D
Other scientists repeated the experiment
6) Which best explains why changes to the atomic theory were necessary?
A
differing ideas
B
new experimental evidence
C
better funding of science
D
improved technology
7) Why do scientists need scientific models?
A
They exactly present the scientific principle being demonstrated
B
They are typically based on mathematical explanations
C
They can often be used to make predictions
D
Once established, they become fairly rigid and rarely change over time
8) Modern atomic theory states that atoms are neutral. How is this neutrality achieved in atoms?
A
having equal numbers of protons and neutrons
B
having more neutrons than protons or electrons
C
having fewer neutrons than protons or electrons
D
having equal numbers of protons and electrons
9) A neutral atom of sodium (Na) has an atomic number of 11 and a mass number of 23. How many neutrons would be found in the nucleus of this atom of sodium?
A
12
B
34
C
11
D
23
10) Two atoms that have the same atomic number but different mass numbers are called
A
isotopes.
B
radicals.
C
compounds
D
ions
*select an answer for all questions
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