A 
ion has __________ protons,__________ neutrons,and __________ electrons.
A) 55,78,54
B) 55,78,55
C) 55,133,54
D) 54,78,55
E) 54,133,55
Correct Answer:
Verified
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A)Henri Becquerel
B)Robert Millikan
C)Joseph John Thomson
D)John
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A)the same atomic mass.
B)the same
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Q27: A 
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