The two substances that make up the greatest percentage of the Earth's crust are oxygen and silicon. They actually combine to form many different minerals and rocks, which are super important to the Earth's structure. The two substances that make up the smallest percentage of the crust are things like gold and platinum.
As for the metals, I think the ones that are metals are probably things like iron and aluminum. Metals are heavier and denser, so they tend to sink down toward the core instead of rising up in the mantle. That’s why you mostly find them deeper in the Earth. Plus, we usually think of metals as being shiny and strong, and those elements definitely fit that description!