Question detail
Which element has the electronic structure of 2,8,8?
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. Neon
- B. Argon
- C. Oxygen
- D. Fluorine
Answer
Argon
Explanation
Argon has 18 electrons, arranged as 2 in the first shell, 8 in the second shell, and 8 in the third shell.
Common mistake
Misrepresenting Electron Shells
Students often incorrectly draw the electron shell diagrams for elements, placing too many electrons in the outer shell or not following the 2,8,8 rule for higher energy levels.
Ensure that the first shell holds a maximum of 2 electrons, the second shell holds up to 8, and the third shell also holds up to 8 for the first 20 elements.
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