Question 1
Question detail
What is the definition of mass number in an atom?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Atoms and isotopes
Question
What is the definition of mass number in an atom?
Answer
Mass number is defined as the total number of protons and neutrons present in the nucleus of an atom.
Explanation
This answer is strong because it clearly states the components that make up the mass number, which is essential for understanding atomic structure. The question tests the student's recall of a fundamental concept in atomic physics.
Common mistake
Confusing Mass Number and Atomic Number
Students often confuse mass number with atomic number, thinking both represent the same quantity.
Remember that the mass number is the total number of protons and neutrons in the nucleus, while the atomic number is only the number of protons.
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