Originally Posted by **avito009** Usually I dont much answer others questions. But I will try. If this is stupid just mention so in your new post OP.
It would be helpful to state Heisenberg Uncertainty Principle. You might say electrons are negatively charged and protons are positively charged. So as per classical mechanics they should fall into each other. But the above principle states that when the electron is closer to the nucleus the position is best determined but not the velocity. But velocity will be large enough so that the electron just flies off the atom. So I am assuming that the electron is far away from the nucleus so its velocity will be determined accurately which will be lower than when the electron is near the nucleus. That being said the position will not be accurate.
Replace the electron cloud concept with this principle.
Does this help? |

No, actually.

First, velocity in QM is a very difficult property to work with. Momentum works much better. (Though see

here.) Yes, we're back to the Math.

Second, it is a bit chancy to talk about electron states in terms of a cloud. As benit13 mentioned the Schrodinger wave equation deals with a "probability cloud" rather than something more physical. Electrons do not exist in a cloud about the nucleus but the probability of finding an electron in a particular state does. (Actually it's more like a weighted sum over probability states but let's not be picky.) Here, too, we are back to the Math.

-Dan