Question

Which is the most abundant element in earth?

Answer 1

1. On earth, oxygen is the most common element, making up about 47% of the earth's mass.
2. Silicon is second, making up 28%, followed by aluminum (8%), iron (5%), magnesium (2%), calcium (4%), sodium (3%), and potassium (3%).
3. All of the remaining elements together make up less than 1% of the earth's mass.