Translate all the word equations to formulaic equations and then balance them:

Classify each statement about effective nuclear charge, zeff, as true or false.

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

What does a numerical subscript following an element in a chemical formula mean?