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How many sub-shells does the third shell contain?
AThree
BSeven
CEight
DEleven
Answer & Solution
Correct answer: A. Three
1. The count of sub-shells matches the shell number.
2. There are three sub-shells, with l equal to 0, 1 and 2, in the third shell.
3. So the correct answer is three.
_Source: syllabus Chemistry, Ch 2 'Structure of Atom'_
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