EVERYDAY SCIENCE

Detailed explanation-1: -silicon (Si), a nonmetallic chemical element in the carbon family (Group 14 [IVa] of the periodic table). Silicon makes up 27.7 percent of Earth’s crust; it is the second most abundant element in the crust, being surpassed only by oxygen.

Detailed explanation-2: -The most abundant non-metal on the earth’s crust is oxygen. Q. (a) Name the most abundant metal in the earth’s crust.

Detailed explanation-3: -#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-4: -Most of the earth’s crust, or outer layer, is made up of eight elements. Oxygen tops the list in terms of abundance, with the planet’s shell being composed of almost 47% of this nonmetallic chemical element. Silicon posts a second-place ranking at nearly 28% by weight.

Detailed explanation-5: -Natural abundance 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.