The image of a small electric bulb fixed on the wall of a room is to be obtained on the opposite wall 3 metres away by means of a large convex lens. What is the maximum possible focal length of the lens required for the purpose? please answer ASAP!!!​

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.

Answerboth technicians (a) and (b);