Q. Which is the most abundant metal in the Earth’s crust?
Answer: Aluminium
Notes: Aluminum is the most abundant metal in the Earth's crust, making up about 8.1% of the crust. However, it's rarely found in its pure form in nature. Instead, it's usually found combined with other elements in minerals like bauxite and cryolite. Two common aluminum compounds are alum and aluminum oxide.  The most abundant non-metal in the Earth's crust is oxygen, which makes up about 46% of the crust.