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How many sub-shells does the second shell contain?
ATen
BSix
CNine
DTwo
Answer & Solution
Correct answer: D. Two
1. Sub-shells are set by the azimuthal quantum number l.
2. There are two sub-shells, with l equal to 0 and 1, in the second shell.
3. So the correct answer is two.
_Source: syllabus Chemistry, Ch 2 'Structure of Atom'_
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