Consider that each of the following species is in its lowest energy state. Which set contains species that all have the same electronic configuration? Question 1 options:

Na+, K+, Rb+, Cs+

Mg2+, Ca2+, Sr2+, Ba2+

N, O, F, Ne

F−, Cl−, Br−, I−

N3−, O2−, Mg2+, Al3+

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

What is the independent variable in this investigation? mass volume sample number substance density

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 ?