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The principal quantum number determines the size and largely the:
AEquality
BEnergy
CEntropy
DEnthalpy
Answer & Solution
Correct answer: B. Energy
1. The principal quantum number n takes values 1, 2, 3 and so on.
2. It determines the size and to a large extent the energy of the orbital.
3. So the correct answer is energy.
_Source: syllabus Chemistry, Ch 2 'Structure of Atom'_
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