Rating | Solver | Clue |
---|---|---|
SEQUESTERED | Kept isolated | |
FLUORINE | ...specially, that it can neither be prepared nor kept in glass vessels. If set free it immediately attacks the containing material, so that it was... | |
SODIUM | ...violently with water, and to be preserved must be kept under petroleum or some similar liquid. Sodium is used combined in many salts, in the fre... |