like helium chemically: crossword clues

Matching Answer
Confidence
INERT
95%
GAS
46%
REACT
43%
NACL
41%
INERTGAS
20%
HCL
20%
GASSES
20%
GASES
20%
RAREGAS
20%
KOH
20%
e.g. Greek Cheese
e.g. O?D (Use ? for unknown letters)