At the most recent mineralogical society meeting, a member shows off her latest find! it is a non-silicate and a native element. which of the following cannot be this mineral and what would be the correct reason why not?

a. nacl – native elements are not combined with other elements. b. au – native elements cannot be minerals such as gold and silver. c. sio - native elements are not combined with other elements. d. pbs - native elements always contain silicon.