Please help me out with this question if you help me I will give you the brain thing and extra points. 9/9 image below.

An electrons position cannot be known precisely only it's probability of being in a certain location can be known

What is a possible quantum number set for an electron in the 3s orbital of a magnesium atom

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