Which of the following represents a pair of isotopes? A) C, N B) H, H C) S,S² D)O₂,O₃ E)all are pairs of isotopes

Question

Quizplus · Accepted Answer

Isotopes are atoms of the same element with the same number of protons but different number of neutrons. Option B shows two hydrogen atoms with the same atomic number (11) but different mass numbers (shown after the element symbol). Therefore, they are isotopes of hydrogen. Option A shows carbon and nitrogen atoms, which are different elements, not isotopes of each other. Option C shows two sulfur atoms but with different numbers of protons, which means they are not even isotopes. Option D also shows two different elements (with unclear formatting). So, only option B represents a pair of isotopes.

Which of the Following Represents a Pair of Isotopes