Question

The electronic configuration of the element with Atomic number 19 is ___________.
A. 2,8,7
B. 2,9,8
C. 2,8,8,1
D. 2,10,7

Answer 1

Hint: Firstly we should always be clear about the electronic configuration of an atom. Now it's the distribution or arrangement of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals. Now using the principles we get that the right answer as per the principles.

Complete step by step solution:
We should always remember that the question is regarding the sector of electronic configuration for the element.
In atomic physics and therefore quantum chemistry, the electron configuration is understood as per the arrangement and distribution of electrons of an atom or molecule within the shells of the atom according to some general principles.
The Electronic configurations are the sole method that describes that each electron moves independently in an orbital according to their general properties and also within the field which is made by all other orbitals. Mathematically, we will say that the configurations are described by Slater determinants or configuration state functions.
We know by the essential and conditional rules of the electronic configuration just like the Aufbau principle, that the electronic configuration of the element with number 19 should be 2,8,8,1 . The element that's talked about within the question is potassium. It's a metal form the series from the alkaline metal with one electron.
Therefore the right option would be option C.

Note:
According to the laws of quantum physics, a particular energy is related to every shell of atom, electrons are ready to move from one configuration to a different by the emission or absorption of energy, within the sort of a photon.