What type of elements are most likely to form more than one type of ion

Where are each of the three particles located within the atom?

Initially, the balloon had 3.0 liters of gas at a pressure of 400 kpa and was at a temperature of 294 k. if the balloon is cooled to 277 k and its volume decreased to 1 l, what will the new pressure in the balloon be?

What must happen before a body cell can begin mitotic cell division