Is the atomic radius of cobalt (Co) larger or smaller than that of titanium (Ti)?

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

How do i turn 2 s into one in the products

Chlorophyll a had the molecular formula c55h72mgn4o5 how many atoms are in this molecule