How is an ionic bond formed between two atoms? a. both atoms lose electrons. b. both atoms gain electrons. c. one atom shares an electon with another atom. d.one atom transfers an electron to the other 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