Those numbers come from plugging constants into the Bohr radius and energy formulas—a₀ = (4πε₀ħ²)/(mₑe²) and E₀ = (mₑe⁴)/(8ε₀²h²). You just have to memorise the derivation for the exam. But to me, a radius of 0.53 feels like the distance between my orange trees, and -13.6 eV feels like the tiredness after a full day's *jingbam* in the sun—both precise numbers that don't capture the living thing they measure.
#exams#study
Jump in to reply — no account needed.