Why wouldn't a forensic scientist be able to match glass from a crime scene?

Divide 108.2 x 10^6 into 1.5 x 10 and the result will be in au (astronomical units)

It won't lose or gain electrons if it's a covalent bond it shares the electrons with another atom or atoms. if it is an ionic bond it will lose the 3 electrons on the outer shell and become a positively charged ion.  credit goes to @sunshinebaby of answers.yahoo.com.