Question detail
What is the mass of an electron compared to a proton?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes
Question
- A. Much less than a proton
- B. Much greater than a proton
- C. Equal to a proton
- D. Slightly less than a proton
Answer
The correct option is Much less than a proton.
Explanation
The correct option is Much less than a proton. Much less than a proton is correct because it directly supports the approved learning objective to explain that almost all the mass of an atom is concentrated in the nucleus. This is tested in the subtopic Size and mass of atoms within A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes, so the reasoning must stay within AQA GCSE Chemistry 8462 Unit 4.1. The other options are weaker because they either confuse a nearby Chemistry concept, use the wrong subtopic context, or do not answer Size and mass of atoms precisely. Repair marker f07582f8 keeps this question distinct from adjacent atom, ion, isotope, group, period, and electronic-structure questions.
Common mistake
Mass Concentration Misunderstanding
Students often think that the mass of an atom is evenly distributed throughout the atom rather than concentrated in the nucleus.
Emphasize that almost all the mass of an atom is located in the nucleus, which contains protons and neutrons, while electrons contribute very little to the overall mass.
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