the table below gives the numbers of protons, electrons, and neutrons in four atoms. based on the table, which atom had a charge of -1

If i can still dissolve more sugar into the solution at a certain temperature what would i call that solution

In the millikan oil drop experiment they determined that every drop had a charge which was a while number multiple of -1.60x10^-19. if a drop has a total charge of -9.60x10^-19 then how many excess electrons are contained within the drop?

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