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Chemistry
Test Description: Unit Test information
Instructions: Answer all questions to get your test result.
1) Which scientist came up with the term Atom?
A
Ernest Rutherford
B
Democritus
C
J.J Thomson
D
Dalton
2) Which scientist discovered the electron in atoms?
A
Rutherford
B
Democritus
C
J.J Thomson
D
Dalton
3) How do you find the number of neutrons in an atom?
A
Same as the number of protons
B
Subtract the atomic number from the atomic mass
C
Same as the atomic number
D
Same as the mass of the atom
4) What are the charges of the electron, protron , and neutron? In that order
A
neutral, negative, and positive
B
negative, neutral, and positive
C
positive, neutral, and negative
D
negative, positive, and neutral
5) What part of the subatomic particles are found in the nucleus?
A
protons and neutrons
B
electrons, protons and neutrons
C
electrons and protons
D
electrons and neutrons
6) Why does an atom have a neutral charge?
A
equal number of protons and neutrons
B
odd number of neutrons
C
equal number of protons and electrons
D
equal number of neturons and electrons
7) If an atom an atomic number of 24 and a mass of 49, how many protons does the atom have?
A
49
B
73
C
24
D
25
8) The atomic mass of an atom is equal to the number of:
A
electrons
B
neutrons
C
protons and electrons
D
protons and neutrons
9) Use a periodic table, how many protons,
A
precipitate
B
solution
C
catalysis
D
inhibitor
10) When steel wool in put into vinegar a chemical reactions starts and the temperature rises. This is an example of a:
A
physical change
B
exothermic reaction
C
physical property
D
endothermic reaction
*select an answer for all questions
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