Which type of chemistry would deal with models of reactions?

Which ocean zone has the most abundant primary producer and why a) the abyssopelagic zone ,du to the absence of light and cold water temperatureb) the bathypelagic zone, due to the absence of light and cold water temperaturec) the mesopelagic zone ,due to uts high light availability and warm water temperature d) the epipelagic zone,due to its high light availability and warm water temperature

Which characteristics can be used to differentiate star systems? check all that apply.

The atomic number, or number, is the described as the number of in the nucleus of an chemical element.