What is unabbreviated electron configuration for argon?

Hint: Unabbreviated electron configuration starts from the very beginning from the $1s$ to the very ending of the element in this case it is argon. It is the same or regular configuration in which electrons are in the lowest possible energy state.

Complete step by step answer:
The electronic configuration basically shows the number and arrangement of electrons in a specific atom. It depends upon the period the element is and s, p, d, f orbitals of the atom.
Abbreviated means short and abbreviated form means short form. Abbreviated electron configuration means the configuration of electrons in short form. In abbreviated electron configuration noble gas configurations are used. Noble gases have full octet or full outer shells which makes it easy to write electronic configuration.
For example, Sodium's atomic number is $11$ and so it’s abbreviated electron configuration is \[[Ne]3{{s}^{1}}\] . But at the same time it becomes difficult if someone doesn’t remember the electronic configuration or atomic number of the noble gas. Not only can’t they identify the element they won’t even be able to use it.
Unabbreviated electron configuration means the electronic configuration without the use of noble gases configuration or also can be said as expanding the noble gases’s electron configuration for ease. For example the upper element sodium can be written as $1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{1}}$ . Here, we expanded the electronic configuration of Neon(Ne).
The unabbreviated electron configuration of Argon is $1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}$

Note: Unabbreviated electronic configuration is more time consuming and much time taking. The electronic configuration of argon can be written as $[Ne]3{{s}^{2}}3{{p}^{6}}$ in abbreviated or short form.