What is the magnitude of the electrostatic force experienced by one elementary charge at a point

Give an example in which the electrical energy changes to light energy

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples

Elements that have one valence electron and are very reactive are called