Did pedro succeed in creating a chemical change

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.

Based of the clues in the question i think the answer would be b or d. hope this .

The answer is a. or the first option. it's a squiggly red line going through a straight black line to the other side. hope this is useful and leave a 5 star and ! good luck testing!

That it's known as destructive interference.