The number of dots that should be placed around argon in a dot diagram is : ( D ) 8
Argon is a noble gas ( inert gas ) just like helium and neon and they have their outer most shell completely filled with its electrons ( 8 valence electrons ), which makes them non-reactive with any other element or compound.
Every valence electron in the Lewis structure of an atom is represented with a dot therefore the 8 valence electrons in Argon will be represented with 8 dots.
Hence we can conclude that the number of dots that should be placed around Argon in a dot diagram is 8.
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