Metals occupy a rather special position in the study of solids, (while) sharing a variety of striking physical properties that other solids such as sulfur lack.
One of my friends has told me the following. But, I cannot yet understand it well and I don’t know if it is correct. Would you please explain it more simply?
You are referring to one single fact about metals (the fact that they have special properties). If you say "while", it looks as if you are referring to two different facts. So you should leave out "while".
Thanks in advance