Question detail
Which of the following statements is true about isotopes?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Atoms and isotopes
Question
- A. Isotopes have the same number of protons but different numbers of neutrons
- B. Isotopes have different atomic numbers
- C. Isotopes have the same mass number
- D. Isotopes are always radioactive
Answer
The correct answer is A: Isotopes have the same number of protons but different numbers of neutrons.
Explanation
The correct answer is A: Isotopes have the same number of protons but different numbers of neutrons. This supports the learning objective "Interpret isotope notation using atomic number and mass number." in Mass number, atomic number and isotopes because it uses the correct atomic and nuclear radiation relationship for Atoms and isotopes. The other options are less suitable because they do not match the required Mass number, atomic number and isotopes idea: Isotopes have different atomic numbers; Isotopes have the same mass number; Isotopes are always radioactive.
Common mistake
Misunderstanding Isotope Notation
Students often confuse the atomic number and mass number when interpreting isotope notation, leading to incorrect identification of protons and neutrons.
To fix this, remember that the atomic number (Z) represents the number of protons, while the mass number (A) is the total number of protons and neutrons. Practice interpreting isotope notation by clearly distinguishing between these two numbers.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.