Question 1
Question detail
What does the mass number of an atom represent?
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. The number of protons in the nucleus
- B. The total number of protons and neutrons in the nucleus
- C. The number of electrons in an atom
- D. The total number of neutrons in the nucleus
Answer
The total number of protons and neutrons in the nucleus
Explanation
The mass number is defined as the total number of protons and neutrons present in the nucleus of an atom.
Common mistake
Confusing Protons and Neutrons
Students often confuse protons and neutrons, thinking they have the same charge or role in the nucleus.
Remember that protons are positively charged and determine the atomic number, while neutrons have no charge and contribute to the mass number.
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