Not everything is uncertain! II
The Schrodinger wavefunction Y for a particle is precisely defined for each quantum state.
The function Y2(r) , the probability to find the particle a distance r from the nucleus, is well-defined.
The energies of quantum states of atoms are extremely well-defined and measured to great precision - often measured to accuracies of 1/1,000,000,000 % = 10-12
But any one measurement will find an electron in the atom at some particular point - the theory only predicts the probability of finding the electron at any point