where an atom with a positive charge binds with one or more negatively charged sulfur atoms. Examples include chalcocite (copper sulfide), galena (lead sulfide), cinnabar (mercury sulfide), and ...

A good example of this substitution can be found ... but the bottom line is that sulfur is not a Greek loan word and so there is no 'phi' that needs to be replaced with 'ph'.

Sulfur in your water supply is easily recognized by its offensive odor. Hydrogen sulfide gas causes the "rotten-egg" or sulfur water smell. Hydrogen sulfide in water causes no known health effects.

Approximately 66 million years ago, the Chicxulub asteroid, estimated to be 10–15 kilometers in diameter, struck the Yucatán Peninsula (in current-day Mexico), creating a 200-kilometer-wide ...