Final answer:
The electron configuration of Argon (Ar) is 1s²2s²2p¶3s²3p¶ or [Ne]3s²3p¶ for its outer electron configuration. It has a total of eight valence electrons, and its electron dot notation shows eight dots surrounding the atomic symbol, indicating a full outer shell.
Step-by-step explanation:
The electron configuration of Argon (Ar), which has an atomic number of 18, is 1s²2s²2p¶3s²3p¶. This can also be represented using the noble gas shorthand as [Ne]3s²3p¶, showing that argon has the neon core configuration plus six electrons in the 3p subshell.
Argon has a full outer shell configuration, which is known for being the most stable electron configuration. The total number of valence electrons for Argon is eight, which all reside in the outermost shell (3s and 3p orbitals).
The electron dot notation or Lewis dot structure for Argon represents these eight valence electrons as dots around the symbol for Argon (Ar). It shows one pair of dots on each of the four sides of the atomic symbol, signifying the full complement of valence electrons and Argon's status as a noble gas with no tendency to form chemical bonds under normal conditions.