By using the periodic table, the electron configuration of selenium (Se) is: [tex]1s^2 2s^2 2p^6 3s^2 3p^6 4 s^2 3 d^{10} 4 p^4[/tex]
Selenium can be defined as a metalloid and it is a chemical element with an atomic number of 34.
Thus, selenium is found in Group XVI of the periodic table and it is a chemical element with the chemical symbol Se.
A periodic table can be defined as an organized tabular array of all the chemical elements, typically arranged in order of increasing atomic number (in rows).
The condensed electron configuration of selenium is written as, 2:8:8:8:6.
By using the spdf orbitals, the electron configuration of selenium is written as:
[tex]1s^2 2s^2 2p^6 3s^2 3p^6 4 s^2 3 d^{10} 4 p^4[/tex]
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