Which of the following is an isotope of carbon?
A¹³CCORRECT
B²⁷Al
C²³Na
D³⁵Cl
JAMB UTMEChemistry
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Why the answer is A, and why the others tempt you.
Isotopes have the same atomic number but different mass numbers. C-13 is an isotope of C-12 (both have 6 protons).
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