Which of the following represent isotopes? A)(¹³C) and ¹²C B)(¹⁴N) and ¹⁸O C)(¹⁶O) and ¹⁸O D)(¹³C) and ¹²C and ¹⁶O and ¹⁸O

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Isotopes are atoms with the same atomic number but different atomic masses due to a different number of neutrons. In option A, both molecules have the same number of protons, neutrons and electrons and are therefore not isotopes. Option B molecules have different numbers of protons and hence are not isotopes of each other. In option C, both molecules have different numbers of neutrons and are not isotopes. Only option D contains molecules with the same number of protons and different numbers of neutrons, making them isotopes.

Which of the Following Represent Isotopes