The chemical element which contains four (4) electrons in its third and outer main energy level is: Silicon (Si).
An electron shell can be defined as the outermost shell of an atom of a chemical element around the atomic nucleus.
Hence, an electron shell is an orbital that is typically accompanied by electrons around the nucleus of an atom.
A sublevel is also referred to as an orbital and it can be defined as an energy level that is associated with the electrons found outside the atomic nucleus.
In Chemistry, there are four main (4) types of sublevel and these are:
- s orbital (sublevel): it has one (1) orbital i.e 1s.
- p orbital (sublevel): it has three (3) orbitals.
- d orbital (sublevel): it has five (5) orbitals.
- f orbital (sublevel): it has seven (7) orbitals.
In the third (3rd) energy level, there are only three (3) sublevels and these are; s, p and d sublevels.
Silicon is a chemical element that is found in group (4) of the periodic table because it has four (4) electrons in its third and outermost shell.
In its ground state, Silicon (Si) contains the following number of electrons:
- Two electrons in its first (n = 1) energy level.
- Eight electrons in the second (n = 2) energy level.
- Lastly, it contains four (4) electrons in its third (n = 3) and outer main energy level.
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