What is similar about the outer shell of electrons in the Alkaline Earth Metal Family?

Electric charge is what ? a. kinetic energy b. radiation c. discovery d. electricity

This question is about electrolysis. metal spoons can be coated with silver. this is called electroplating. suggest one reason why spoons are electroplated?

Concentrations expressed as a percent by mass are useful when the solute is a a. liquid b. gas c. solid