does it have any adverse effect on human body?
UNANSWERABLE
where is silicon most commonly found on earth More than 90% of the Earth's crust is composed of silicate minerals when was it discovered? Due to the abundance of silicon in the Earth's crust, natural silicon-based materials had been used for thousands of years who developed the first si semiconductor device? Greenleaf Whittier Pickard when was this device developed? 1906 can you tell me some characteristics of this element? Its melting and boiling points of 1414 °C and 3265 °C respectively are the second-highest among all the metalloids and nonmetals, being only surpassed by boron.
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Silicon [SEP] Introduction
Silicon is a chemical element with the symbol Si and atomic number 14. It is a hard, brittle crystalline solid with a blue-grey metallic lustre, and is a tetravalent metalloid and semiconductor. It is a member of group 14 in the periodic table: carbon is above it; and germanium, tin, and lead are below it. It is relatively unreactive. Because of its high chemical affinity for oxygen, it was not until 1823 that Jöns Jakob Berzelius was first able to prepare it and characterize it in pure form. Its oxides form a family of anions known as silicates. Its melting and boiling points of 1414 °C and 3265 °C respectively are the second-highest among all the metalloids and nonmetals, being only surpassed by boron.