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Pramila Pramila
wrote...
Posts: 599
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6 years ago
12C and 13C differ in ________.
A) atomic mass
B) ionic number
C) atomic number
D) number of protons
E) number of electrons
Textbook 
Environment: The Science Behind the Stories, Canadian Edition

Environment: The Science Behind the Stories, Canadian Edition


Edition: 3rd
Authors:
Read 71 times
1 Reply

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Replies
wrote...
6 years ago
A
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