Related Clues:

• It's argon? Neon? Neither taking on being reactive
• Eg, helium, xenon etc.
• Neon sign at heart of eery flickering
• One expects no reaction from such awful ingrates
• Angriest outpouring from one at the edge of a table
• Such as neon or xenon
• Eg, argon
• He is one
• Neon, e.g
• Non-reactive element such as helium, neon or argon
• Eg, krypton or argon
• Granite's polluted by helium, eg
• Neon, eg
• Helium, e.g
• Krypton, for instance