Review We can only speak of the probability of finding an electron somewhere A collection of such probabilities,for an electron at a given energy,is called an orbital Orbitals are described mathematically by wavefunctions,平(r,θ，φ，t) Square to find the probability of observing the electron at a given point Operate on平(Schrδdinger eqn,HΨ-E)to find the energy of the electron in that orbital -11Review  We can only speak of the probability of finding an electron somewhere  A collection of such probabilities, for an electron at a given energy, is called an orbital  Orbitals are described mathematically by wavefunctions, Ψ(r,θ,φ,t)  Square Ψ to find the probability of observing the electron at a given point  Operate on Ψ (Schrödinger eqn, HΨ=ΕΨ) to find the energy of the electron in that orbital III-11