1. dpsi/dx=Akcoskx => d^2psi/dx^2=-Ak^2senkx = -k^2psi
=> Equação de Schrödinger:
-hbar^2/2m d^2psi/dx^2 +V(x)psi = hbar^2k^2/2m * psi + 0*psi = E * psi
satisfeita para E = hbar^2k^2/2m

2. (desenho)

3. ~167 elétrons

4.
(a) P = 0.48
(b) p = h/lambda = h/L

5.
(a) 2.58e-34 Js
(b) 0
(c) 2.58e-34 Js

6.
(a) s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^1
(b) n=4, l=1