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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
J.J Thomson
B
Ernest Rutherford
C
Dalton
D
Democritus
2) Which scientist discovered the electron in atoms?
A
J.J Thomson
B
Dalton
C
Democritus
D
Rutherford
3) How do you find the number of neutrons in an atom?
A
Same as the mass of the atom
B
Same as the number of protons
C
Subtract the atomic number from the atomic mass
D
Same as the atomic number
4) What are the charges of the electron, protron , and neutron? In that order
A
neutral, negative, and positive
B
negative, positive, and neutral
C
positive, neutral, and negative
D
negative, neutral, and positive
5) What part of the subatomic particles are found in the nucleus?
A
electrons and protons
B
electrons and neutrons
C
protons and neutrons
D
electrons, protons and neutrons
6) Why does an atom have a neutral charge?
A
equal number of neturons and electrons
B
equal number of protons and neutrons
C
equal number of protons and electrons
D
odd number of neutrons
7) If an atom an atomic number of 24 and a mass of 49, how many protons does the atom have?
A
73
B
25
C
49
D
24
8) The atomic mass of an atom is equal to the number of:
A
protons and electrons
B
electrons
C
neutrons
D
protons and neutrons
9) Use a periodic table, how many protons,
A
precipitate
B
catalysis
C
solution
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
endothermic reaction
C
exothermic reaction
D
physical property
*select an answer for all questions
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