50 Unique MCQs
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Expert Strategies
Quantum shortcut
l=0→s,1→p,2→d,3→f. For l=2, m = -2..+2 (5 orbitals)
Aufbau rule
4s fills before 3d because (n+l) = 4 < 5
Hydrogen spectrum trick
Ly Ba Pa → UV, Visible, IR