Sub energy pretty much explains itself: It is below energy level
Depends on what one means by "smaller". Since sublevels are "inside" or part of the principle energy level, then yes, they are smaller.
Principal energy levels are an atom's major energy levels, ranging in value from 1 to 7. Energy sublevels are contained within principal energy levels, and their number increases as the value of the principal energy level increases.
Energy levels are divided into sublevels, which are further divided into orbitals. Orbitals are regions of space where electrons are likely to be found. Each orbital can hold a maximum of 2 electrons with opposite spins.
The first and second principle energy levels contain only s and p sublevels. The first level has only an s sublevel, while the second level has both s and p sublevels.
electrons occupy sublevels in the order of increasing energy .
There are 2 sublevels in energy level 2: the s sublevel and the p sublevel.
Because of the energy levels, sublevels and the probability map
Electrons with the greatest energy are found in the outermost sublevels, typically in the s or p sublevels of an atom. These sublevels are farther from the nucleus and have higher energy levels than the inner sublevels.
The first 3 energy levels are filled, the 4s and 4p and 4d sublevels are filled, and the 5s and 5p sublevels are also filled. So only the first three energy levels are completely filled. The fourth and fifth energy levels are partly filled. The electron configuration is 1s22s22p63s23p63d104s24p64d105s25p6 or [Kr]4d105s25p6.
the orbitals of the sublevels of the same principal energy level differ in shape which describes where the electron is likely to be found. Also the orbitals of sublevels have different energy levels. In ascending enegy in any level s < p < d < f < g etc HOWEVER whether the different sublevels exist depends on the principal energy level ie 1s 2s, 2p 3s, 3p, 3d 4s, 4p, 4d, 4f
There are one 3s orbital, three 3p orbitals, and five 3d sublevels.
There are two energy sublevels in the second energy level - the s sublevel and the p sublevel. The s sublevel can hold a maximum of 2 electrons, while the p sublevel can hold a maximum of 6 electrons.