Silicon is present in the Earth's crust at concentrations of 28%, making it the second most abundant element there. Silicon's concentration in seawater can vary from 30 parts per billion on the surface of the ocean to 2000 parts per billion deeper down. Silicon dust occurs in trace amounts in Earth's atmosphere. Silicate minerals are the most common type of mineral on earth. Silicon makes up 14.3 parts per million of the human body on average. Only the largest stars produce silicon via stellar fusion.
silicon is present in the earth's crust at concentrations of 28% making it the second most abundant element there silicon's concentration in seawater can vary from 30 parts per billion on the surface of the ocean to 2000 parts per billion deeper down silicon dust occurs in trace amounts in earth's atmosphere silicate minerals are the most common type of mineral on earth silicon makes up 143 parts per million of the human body on average only the largest stars produce silicon via stellar fusion