The answer is <span>D.when the aim is to show electron distributions in shells. This is because there are some instances when elements don't possess a regular or normal electron configuration. There are those who have special electron configurations wherein a lower subshell isn't completely filled before occupying a higher subshell. It is best to visualize such cases using the orbital notation.</span>
Nitrogen, arsenic, antimony & bismuth
Explanation:
Phosphorus belongs to the 15th group, that is nitrogen family.
Natures are decided by the number of valence electrons.
In a family, all elements have same outer electronic configuration or you say number of electrons.
General electronic con.: ns²np³
An electron has a negative charge. When an atom loses an electron, it becomes a positive ion.
When an atom of lithium loses an electron and becomes an ion, it has one less electron shell, so its radius is smaller than the radius of the atom.
The answer is 3.
