No, but it is dangerous in large amounts, because it is an
asphyxiant gas. Also, it's extremely flammable.
View page
Neon is not toxic; may be asphyxiant.
View page
chemicals that block the supply of oxygen to the body
View page
Yes
Nitrogen is a simple asphyxiant that is without other
significant physiologic effects. Inhalation of nitrogen is
dangerous only when it lowers the available oxygen in air to below
life-sustaining levels
View page
Oxygen - No Nitrogen - No Carbon Monoxide - Yes Argon - No