An object 4.0 cm tall is placed at the center of curvature of a concave mirror that has a focal length of 2.0 cm. Find the characteristics of the image produced by:drawing ray diagram and using the mathmatical formula

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.

Ireally don’t know

The radiation of the fire causes the saucepan to heat up. the conduction of the saucepan then to distribute the heat over the saucepan and to give heat to the water. the convection of the water distributing the heat within the water, till all the water is boiling