There are four naturally occurring isotopes of the element Christmasium. The relative abundance of each is: Ch-50 = 4.31%, Ch-52= 83.765%, Ch-53= 9.55%, and Ch-54= 2.38%. Calculate the average atomic mass of Christmasium

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