Question

By mass, which of these elements is the second most common element on Earth ?

Answer 1

The second most common element on Earth by mass is oxygen, with a composition of approximately 29.5%. The most common element on Earth is hydrogen, which makes up about 71% of the Earth's mass. The remaining elements, including carbon, nitrogen, and calcium, are present in much smaller amounts.

Answer 2

By mass, the second most common element on Earth is iron. Iron is the most abundant metal in the Earth's crust, and makes up a significant portion of the Earth's core.

Answer 3

By mass, the second most common element on Earth is oxygen. Oxygen makes up approximately 29% of the Earth's mass, while the most common element is iron, which makes up approximately 34% of the Earth's mass. Other common elements found on Earth include silicon, magnesium, sulfur, and nickel.