(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​

It's C. Potassium and iodine

they float because they are less dense than the water itself

something denser than water, like a rock, will sink to the bottom

an adaptation is a change or process by which an organism takes to be better suited for its environment. for example; migration is a behavioral adaptation, this is needed because birds are not built to last extremely cold climates. there are different adaptations because there are different species needing to adjust to different things, bears don't migrate; they hibernate.