You add the protons of each atom together. The fact that it is an ionic compound shouldn't bother you at all.
You have to balance out those forces and apply the same amount of equal and opposite force to it. I hope I helped ^^
Convection currents drive the movement of Earth's rigid tectonic plates in the planet's fluid molten mantle. In places where convection currents rise up towards the crust's surface, tectonic plates move away from each other in a process known as seafloor spreading
C) rocks and mineral particle. Topsoil is what you see in everyday life sooo you don’t even need a book for that but ok. I’TS 100% RIGHT though. Hope it helps