Periodic Table: Element Symbols — Which element is a major component of chlorophyll at the center of its porphyrin ring?

On the periodic table, the symbol $So$ refers to which element?

On the periodic table, which element has the symbol $T$?

Which element is located in Group 2 (alkaline earth metals) and Period 3 of the periodic table?

Which element in Period 2 of the periodic table has the greatest atomic mass?

Which element is most directly associated with providing strength to bones in the human body?

Which element has the largest atomic number?

Which element has more protons: tin or iodine?