Rating | Solver | Clue |
---|---|---|
HELIUM | Inert gas | |
ARGON | Inert gas | |
RADON | Inert gas | |
XENON | Inert gas | |
KRYPTON | Inert gas | |
NEON | Inert Gas | |
NITROGEN | ...orless, comprising four fifths of the atmosphere by volume. It is chemically very inert in the free state, and as such is incapable of supportin... | |
PARAFFINE | ...sed as an illuminant and lubricant. It is very inert, not being acted upon by most of the strong chemical reagents. It was formerly regarded as ... |