Question detail
Why do atoms of the same element have the same number of protons?
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. Because they are defined by their element
- B. Because they have the same number of electrons
- C. Because they have the same atomic mass
- D. Because they are chemically identical
Answer
The correct option is Because they are defined by their element.
Explanation
The correct option is Because they are defined by their element. Because they are defined by their element is correct because it directly supports the approved learning objective to explain why atoms of the same element have the same number of protons. This is tested in the subtopic Relative electrical charges of subatomic particles 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 Relative electrical charges of subatomic particles precisely. Repair marker 5c28f96d keeps this question distinct from adjacent atom, ion, isotope, group, period, and electronic-structure questions.
Common mistake
Misunderstanding Protons in Elements
Students often think that atoms of the same element can have different numbers of protons.
Remember that the defining characteristic of an element is its number of protons; all atoms of the same element must have the same number of protons.
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