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Information valid for Si-28 unless otherwise noted

Basic Information

Symbol: Si
Atomic Number: 14
Mass: 28.0855
Melting Point: 1410.0 C
Boiling Point: 2355.0 C
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

[Bohr Model of Silicon]
Number of Energy Levels: 3

  1. First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 4


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


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