From the first paragraph of the article: > An atom typically can’t be assigned a definite position, for example — we can merely calculate the probability of finding it in various places. Is this really the case? Or maybe author meant 'electron' instead of 'atom'? I mean, if we wouldn't be able of calculating the position of an Atom, how could "A Boy And His Atom" would be possible? https://www.youtube.com/watch?v=oSC…
There is a limit to the precision of a position measurement of any particle, and atoms are made of many particles. The Heisenberg Uncertainty Principle states that the uncertainty of the position and momentum of a particle are related. In particular, the product of the errors has a constant lower bound. Visually, if you think of (1d) position and (1d) momentum plotted on a 2d graph, then Heisenberg's principle means that particles are not points, but rectangles with a minimum area.