Why is cobalt placed before nickel on the periodic table of elements even though it has a higher average atomic mass than nickel

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

The footprints of a dinosaur and the burrow of an ancient shrimp are examples of which kind of fossils

What is bromine+calcium iodide--> calcium bromide +iodine balanced