How many atoms of neon gas are in 19.3 moles?

First, it doesn't matter what is counted in moles, whether it's atoms, molecules, ions, coins, chickens, etc.

So 19.3 moles of something(in this case neon atoms) is calculated like this:

a plasma is a warm ionized gasoline consisting of approximately equal numbers of definitely charged ions and negatively charged electrons. the characteristics of plasmas are notably unique from the ones of ordinary neutral gases in order that plasmas are considered a awesome "fourth kingdom of remember."