Chemical Elements.com - Silicon (Si)

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Basic Information

Name: Silicon
Symbol: Si
Atomic Number: 14
Atomic Mass: 28.0855 amu
Melting Point: 1410.0 °C (1683.15 K, 2570.0 °F)
Boiling Point: 2355.0 °C (2628.15 K, 4271.0 °F)
Number of Protons/Electrons: 14
Number of Neutrons: 14
Classification: Metalloid
Crystal Structure: Cubic
Density @ 293 K: 2.329 g/cm³
Color: grey

Atomic Structure

Number of Energy Levels: 3

First Energy Level:

Second Energy Level:

Third Energy Level:

Isotopes

Isotope	Half Life
Si-28	Stable
Si-29	Stable
Si-30	Stable
Si-31	2.62 hours
Si-32	100.0 years

Facts

Date of Discovery: 1823
Discoverer: Jons Berzelius
Name Origin: From the Latin word silex (flint)
Uses: glass, semiconductors
Obtained From: Second most abundant element. Found in clay, granite, quartz, sand

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