GENERAL GEOLOGY

Detailed explanation-1: -Silicon makes up 27.7% of the Earth’s crust by mass and is the second most abundant element (oxygen is the first). It does not occur uncombined in nature but occurs chiefly as the oxide (silica) and as silicates. The oxide includes sand, quartz, rock crystal, amethyst, agate, flint and opal.

Detailed explanation-2: -#2: Silicon More than 90% of the Earth’s crust is composed of silicate minerals, making silicon the second most abundant element in the Earth’s crust. Silicon links up with oxygen to form the most common minerals on Earth.

Detailed explanation-3: -Oxygen is the most abundant element in the earth’s crust while silicon is second. The compound of silicon and oxygen, which is silica, makes up about 60% of this crust.

Detailed explanation-4: -Silicon is the seventh most abundant element in the universe and the second most abundant element in the earth’s crust. Today, silicon is produced by heating sand (SiO2) with carbon to temperatures approaching 2200°C. Two allotropes of silicon exist at room temperature: amorphous and crystalline.