Substance in which all atoms are alike

What are the first three quantum numbers for the electrons located in subshell 2s?

How does the motion of particles in a gas change as the gas cools

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 ?