Which of the following pairs of elements would have similar properties and why? a. potassium and bromine b. chlorine and carbon c. magnesium and calcium d. flourine and neon

1) describe the physical layout of the ocean floor ? 2) explain how the dumbo octopus swims differently than other octopus species and why this would be an advantage in the aphonic zone . 3) why are the types of organisms that live at each underwater hot vent so dramatically different ?