(Its actually Physical Science) Which two elements in the list would bond together based on their ionic charges?

A. calcium and potassium
B. potassium and neon
C. potassium and iodine
D. calcium and neon​

What would be the most likely result if the ph of the stomach were increased to 5

Read the following scenario to answer the following question. over the past 60 years, many amphibian species have experienced significant population declines, and some species have become extinct. scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. however, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. these global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. in switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction. when most populations of a wide-ranging amphibian species are lost and the few remaining populations are widely separated, we expect to see that a. the founder effect becomes increasingly important b. microevolution no longer occurs c. gene flow between populations is reduced d. artificial selection becomes a greater factor in microevolution

Which geologic feature would most likely be represented by contour lines john far apart from one another? a cliff a hill a plain a valley