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The first principal energy level has one sublevel, 1s
The second energy level has 2 sublevels 2s, and 2p
The third energy level has 3 sublevels, 3s, 3p, and 3d
The fourth energy level has 4 sublevels, 4s, 4p, 4d, and 4f
After that, the fifth, sixth, and seventh energy levels also have four sublevels each.
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The second energy level has 2 sublevels 2s, and 2p
The third energy level has 3 sublevels, 3s, 3p, and 3d
The fourth energy level has 4 sublevels, 4s, 4p, 4d, and 4f
After that, the fifth, sixth, and seventh energy levels also have four sublevels each.
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An orbital is a region in space where there is a high probability of finding an electron.
In an atom there are orbitals. Orbitals are mathematical probability functions that describe regions in space where an electron could be found according to the wave mechanical model of the atom.
In the 3p sublevel, there are three orbitals. In the 2s sublevel, there is only one orbital. In the 4f sublevel, there are seven orbitals. In the 5d sublevel, there are five orbitals. In the third principal level, there are three nine orbitals in the fifth energy level, there are 25 orbitals. Note that in principal level, there are n^2 orbitals where n is the principal energy level.
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