Question detail

Which of the following correctly describes isotopes?

Try the question, check the answer, then read the explanation to understand the curriculum point.

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At a glance

MCQ

Type

practice

Style

Topic

Atoms and isotopes

Question

A. Atoms with the same number of protons but different numbers of electrons
B. Atoms with the same number of neutrons but different numbers of protons
C. Atoms with the same number of protons but different numbers of neutrons
D. Atoms with different numbers of protons and neutrons

Answer

The correct answer is C: Atoms with the same number of protons but different numbers of neutrons.

Explanation

The correct answer is C: Atoms with the same number of protons but different numbers of neutrons. This supports the learning objective "Define atomic number as the number of protons in the nucleus of an atom." 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: Atoms with the same number of protons but different numbers of electrons; Atoms with the same number of neutrons but different numbers of protons; Atoms with different numbers of protons and neutrons.

Common mistake

Confusing Atomic Number and Mass Number

Students often confuse atomic number with mass number, thinking both refer to the same quantity.

Remind students that atomic number is the number of protons in the nucleus, while mass number is the total number of protons and neutrons.

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