Per NCERT, an 'elementary entity' (whose mole is counted by Avogadro's number) can be which of these?
AOnly electrons
BOnly atoms
CAn atom, molecule, ion, electron, OR any specified group of particles
DOnly molecules
Answer & Solution
Correct answer: C. An atom, molecule, ion, electron, OR any specified group of particles
Per NCERT §1.3.3, elementary entity = atom/molecule/ion/electron/group of particles. Must specify what entity you mean.
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