@waitbutwhy By mass, Earth is composed of ~32% Iron. Next most common element by mass is oxygen at ~30%, but only a small portion of that is in the atmosphere.
@但为什么按质量计算，地球由约32%的铁组成。按质量计，第二常见的元素是约30%的氧，但其中只有一小部分存在于大气中。
@waitbutwhy By mass, Earth is composed of ~32% Iron. Next most common element by mass is oxygen at ~30%, but only a small portion of that is in the atmosphere.
@但为什么按质量计算，地球由约32%的铁组成。按质量计，第二常见的元素是约30%的氧，但其中只有一小部分存在于大气中。