Final answer:
The statement is True. Inert or noble gases have full outer s and p sub-levels contributing to their stability and lack of reactivity.
Step-by-step explanation:
The statement 'Inert gases' s and p sub-levels are full' is True. Inert gases, also known as noble gases, have full outer s and p sub-levels. For example, helium has the electron configuration of 1s², meaning its 1s sub-level is full. Other inert gases like neon have the electron configuration of 1s² 2s² 2p¶, where both the s and p sub-levels of the second shell are full. This configuration extends throughout the noble gases, where the highest occupied s and p sub-levels are completely filled (e.g., argon has 3s² 3p¶).
This complete filling of s and p sub-levels leads to the stability and lack of reactivity that defines noble gases. Although under certain conditions, compounds can be formed with some of the heavier noble gases such as radon (Rn), xenon (Xe), krypton (Kr), and argon (Ar).