In 2010-11, the average tuition and fees at a private not-for-profit college were $26,769, while tuition and fees at private for-profit colleges came in at $14,236. The costs of books and supplies at private not-for-profit colleges was $1,217, while the cost of books at for-profit colleges was lower, at $799.uition expenses can vary greatly, depending on the type of two-year institution you hope to attend. In 2009, the average tuition at a public two-year college was $2,156. Average tuition at a private not-for-profit two-year college was $12,725, while tuition at a private for-profit two-year college was $13,858.
Number of Neutrons Melting Point Boiling Point Date of Discovery Crystal Structure. Element Groups: Alkali Metals Alkaline Earth Metals Transition Metals Other Metals Metalloids Non-Metals Halogens Noble Gases Rare Earth Elements Basic Information | Atomic Structure | Isotopes | Related Links | Citing This Page. Basic Information Name: Silicon Symbol: Si Atomic Number: 14 Atomic Mass: 28.0855 amu Melting Point: 1410.0 Â°C (1683.15 K, 2570.0 Â°F) Boiling Point: 2355.0 Â°C (2628.15 K, 4271.0 Â°F) Number of Protons/Electrons: 14 Number of Neutrons: 14 Classification: Metalloid Crystal Structure: Cubic Density @ 293 K: 2.329 g/cm 3 Color: grey Atomic Structure
Silicon is a chemical element with symbol Si and atomic number 14. It is a tetravalent metalloid, more reactive than germanium, the metalloid directly below it in the table.Controversy about silicon's character dates to its discovery; it was first prepared and characterized in pure form in 1823.he isotopes of silicon range in mass number from 22 to 44. The most common decay mode of six isotopes with mass numbers lower than the most abundant stable isotope, silicon-28, is Î²+ , primarily forming aluminium isotopes (13 protons) as decay products.