How many protons, electrons and neutrons in f-?

Of the groups of elements below, which are most likely to gain electrons to become anions? a. alkali metal b. boron group c. halogen d. transition metal

If 1.8 l of water is added to 2.5l of a 7.0 m koh solution, what is the molarity of the new solution

Describe at least two advantages and two disadvantages of using hydropower as a source of energy.