Which of the following statements best describes the difference between an element and an isotope?

A) An isotope has a particular number of protons and neutrons, while an element has a particular number of protons and a varying number of neutrons.

B) An element has a particular number of protons and neutrons, while an isotope has a particular number of protons and a varying number of neutrons.

C) Chemists speak in terms of elements, while physicists prefer the more specific term of isotope.

D) An isotope has a particular number of protons and neutrons, while an element has a particular number of neutrons and a varying number of protons.

E) An element has a particular number of protons and neutrons, while an isotope has a particular number of neutrons and a varying number of protons.

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