Medium Practice — Set 2

Quick Recap — Uncertainty, Nodes & Magnetism

• Heisenberg: $\Delta x\,\Delta p\ge\dfrac{h}{4\pi}$; the photoelectric $KE_{max}$ depends on frequency, while intensity sets the number of electrons.
• $n+l$ rule orders orbital energies; shielding/penetration order $s>p>d>f$.
• Magnetic moment: $\mu=\sqrt{n(n+2)}$ BM ($n$ = unpaired electrons); diamagnetic = 0 unpaired, paramagnetic = has unpaired.
• Nodes: radial $=n-l-1$, angular $=l$.