what element is the most abundant in the earth's crust?

The most abundant element in the Earth's crust is oxygen , which makes up about 46% of the Earth's crust by mass. Oxygen is highly reactive and commonly found in combination with other elements forming oxides, such as in minerals like granite, quartz, rust, and limestone. Silicon is the second most abundant element in the crust, making up about 28%, followed by aluminum at about 8.3%.