Question detail
Describe how electrons are arranged in an atom according to energy levels.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes
Question
Describe how electrons are arranged in an atom according to energy levels.
Answer
Electrons are arranged in energy levels around the nucleus of an atom, occupying the lowest available energy levels or innermost shells first. This means that the first shell can hold up to 2 electrons, the second shell can hold up to 8, and so on, following the 2n² rule.
Explanation
This answer is strong because it clearly explains the principle of electron arrangement in terms of energy levels and provides the maximum capacity of the first two shells. The question tests the student's understanding of electronic structure and the organization of electrons within an atom.
Common mistake
Misunderstanding Electron Shells
Students often think that electrons can occupy any energy level without following the order of filling from the lowest energy level first.
Emphasize that electrons must fill the lowest available energy levels or innermost shells before moving to higher energy levels.
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