Respuesta :
The Correct answer is option ll
II. Mg: 1s22s22p63s1
What is Electronic Configurations?
The electron configuration of an element describes how its electrons are distributed throughout its atomic orbitals. Atomic electron configurations follow a standard nomenclature in which the number of electrons that each atomic subshell has is listed in superscript after the order in which the electrons are found in each subshell.
Electron configurations have the following uses:
determining the valency of an element.
anticipating the attributes of a group of components (elements with similar electron configurations tend to exhibit similar properties).
data analysis for the atomic spectrum.
This nomenclature for the distribution of electrons in atomic orbitals of atoms was adopted not long after Ernest Rutherford and Niels Bohr published their Bohr model of the atom in 1913.
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