Question detail
What defines an isotope of an element?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Atomic structure
Question
- A. Different numbers of protons
- B. Different numbers of neutrons
- C. Different numbers of electrons
- D. Different atomic numbers
Answer
Different numbers of neutrons
Explanation
Isotopes are defined by having the same number of protons (atomic number) but different numbers of neutrons, which results in different mass numbers.
Common mistake
Confusing Isotopes with Ions
Students often confuse isotopes with ions, thinking they are the same because both involve variations of atoms.
Remember that isotopes have the same number of protons but different numbers of neutrons, while ions are atoms that have gained or lost electrons, resulting in a charge. For example, Carbon-12 and Carbon-14 are isotopes of carbon, while Na+ is a sodium ion.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.