3) Which element is the 2s orbital closest to the nucleus? A) Te
B) Se
C) O
D) Po
E)S

Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?

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 ?

What causes most sediment to wash or fall into a river