Question

The electronic configuration of element is 2,8,4 name and write its physical property

Answer 1

The element is SILICON(Si)

It is a metalloid, having both the property of metal and non metal

Answer 2

The element is silicon.

One allotrope is in the form of shiny, grayish-black, needle-like crystals, or flat plates. The second allotrope has no crystal structure and usually occurs as a brown powder. The melting point of silicon is 1,410°C (2,570°F) and the boiling point is 2,355°F (4,270°F). Its density is 2.33 grams per cubic centimeter.