All electrons are created equal.
"Size" is a more difficult concept than you might expect when it comes to dealing with particles small enough for quantum, rather than Newtonian, physics to be a significant factor. The question is ill-defined and you'd have to be a lot more precise about your terminology and the conditions in order for an answer to have any real meaning.
All of them are the exact same size no matter what it is.
Two figures are congruent if you can "pick one up" and then place it down on top of the other one in such a way that the two exactly overlay each other... in other words, if they are the exact same shape and size. So, any two circles will always have the same shape, but not necessarily the same size. Only circles that have the exact same size (as measured by matching radius, diameter, circumference, or surface area) are congruent.
congruent
Sides that are the exact same size
they are the same exact size
Similar means that the figures are the same shape yet not the same size. If the figures are the exact same size and shape, then they are congruent.
It is ok as long as you have the same size on each axle. In other words you must have the exact same size tire on the front axle or the rear axle. Never mix sizes on an axle.
For an electron cloud model, the analogy would be the propeller blades on a plane.
The ATOM decreases in size when it loses an electron and increases when electrons are added.
yes I believe and i'm positive that they're the exact same sizes
Neither. They're the exact same size unless you ask for a different size.
At an atomic level they cannot be exactly the same shape or size.