The temperature at which all atomic kinetic motion ceases is absolute zero, which is 0 Kelvin or -273.15 degrees Celsius (-459.67 degrees Fahrenheit).

However, it's important to note that:

* Absolute zero is a theoretical temperature. We can get incredibly close to it, but it's impossible to actually reach it.

* Even at absolute zero, there's still some residual energy present. This is due to quantum mechanics, and it's called "zero-point energy."

* "Kinetic motion" isn't completely zero at absolute zero. Even at that temperature, atoms still exhibit quantum fluctuations, which are tiny, random vibrations.

So, while we can say that all *classical* kinetic motion ceases at absolute zero, it's not entirely accurate to say that *all* atomic motion stops.