Atomic Element Z = 14 • Metalloid
Silicon (Si) — Atomic Data, Electron Shells & Reactions
Silicon (symbol Si, atomic number 14) has a standard atomic weight of 28.085 u and ground-state configuration [Ne] 3s2 3p2.
Atomic Number (Z)
14
IUPAC Symbol
Si
Standard Atomic Weight
28.085 g/mol
Period / Group / Block
3 / 14 / p-block
Condensed Electron Config
[Ne] 3s2 3p2
Full Subshell Config
1s2 2s2 2p6 3s2 3p2
Principal Shell Occupancy
[2, 8, 4]
Pauling Electronegativity
1.9
First Ionization Energy
786 kJ/mol
Covalent Radius
111 pm
Melting Point
1687 K (1413.85 °C)
Boiling Point
3538 K (3264.85 °C)
Density
2.329 g/cm³
Oxidation States
+4, -4
Si (Z=14) — Valence shell highlighted in vermilion