Question detail
What does the modern atomic model include that was not part of the plum pudding model?
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. Electrons are embedded in a positive sphere.
- B. The existence of a dense nucleus.
- C. Electrons have fixed positions.
- D. Atoms are indivisible.
Answer
The existence of a dense nucleus.
Explanation
The modern atomic model recognizes the existence of a dense nucleus containing protons and neutrons, which was not accounted for in the plum pudding model.
Common mistake
Confusing Atomic Models
Students often confuse the characteristics of the plum pudding model with those of the nuclear model, mistakenly attributing the presence of electrons in the nucleus.
To fix this, students should focus on the key features of each model: the plum pudding model describes a positively charged sphere with electrons embedded, while the nuclear model has a small, dense nucleus containing protons and neutrons, with electrons orbiting around it.
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