Which element (neutral atom) has 18 electrons?

In the context of the periodic table and element symbols, which element is commonly used for shiny trim on cars (often as chrome plating)?

Which element has an atomic number of $80$ (i.e., $80$ protons in its nucleus)?

Which element has $53$ protons (atomic number $53$)?

Which element has 30 protons in its nucleus?

Which of the following is a valid two-letter element symbol from the periodic table?

What is the name of the element with 82 protons (atomic number $82$)?

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?