What substance combined with iron from the shovel to form rust

Smog is the term used to describe the combination of fog and smoke

This large tectonic plate is bounded on three sides by whats know as the ring of fire. what is the name of this tectonic plate? a) pacific plate b) eurasian plate c) north american plate d) indo- australian plate plz it's science but there's no option for science so i picked chemistry

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.