If the compound phosphorus pentaiodide (pis) has no lone pairs, it would take which shape?

Different isotopes indicate that an element will have different numbers of

Compare and contrast physical changes with chemical changes.

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering