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Help please

When you have two
isotopes of an atom, Carbon-12 and Carbon-13 for example, what has changed in the atomic structure?
A. Number of protons
B. Number of electrons
C. Number of neutrons

User Kmek
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1 Answer

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C. The number of neutrons
Since Carbon 12 has 6 neutrons
And carbon 13 has 7 neutrons.
You know that elements have equal protons (atomic number) and electrons
User Amethystic
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