Looking at the periodic table, which of these elements has the smallest atomic radius?

Who is better, messi or cristiano, i need this for a chemistry class. asap

How will the emission of an alpha particle affect the atomic number of an atom

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