Silicon (Si) Chemical Properties

• Atomic Weight 28.0855
• Isotopes
  • 28 (92.23%)
  • 29 ( 4.67%)
  • 30 ( 3.10%)
• Atomic Number 14
• Atomic Radius 177 pm (covalent bond)
• Ionic Radius 40 pm
• Density (solid) 2.33 g/cm**3
• Density (liquid) 2.53 g/cm**3
• Atomic density 4.995e22 atoms/cm**3
• Atoms per unit cell 8
• crystal structure: diamond
• density of surface atoms
  • (100) 6.78e14/cm**2
  • (110) 9.59e14/cm**2
  • (111) 7.83e14/cm**2
• Lattice Constant 5.431 angstrom
• Bond Length 2.36 angstrom

Important Compounds

• Silicon Dioxide
• Silicon Nitride
• Titanium Silicide
• Platinum Silicide
• Silicon Tetrachloride