Menu
Other Resources

Compare Silicon vs Phosphorus

Comparing Silicon (Si) and Phosphorus (P). Atomic numbers 14 and 15 with atomic masses 28.084 u and 30.974 u, classified as metalloid and nonmetal. Below: a side-by-side comparison of their physical, atomic, electron-configuration and historical properties, including density, melting and boiling points, ionization energies, oxidation states and discovery history.

vs
Si
Silicon
#14
P
Phosphorus
#15

Periodic properties of the elements

SiliconPhosphorus
SymbolSiP
Atomic number1415
Group1415
Period33
Blockpp
Element categoryMetalloidNonmetal

Physical properties

SiliconPhosphorus
Phase at STPSolidSolid
Density2.329 g/cm31.823 g/cm3
Atomic weight28.084 u30.9738 u
Melting point1687 K
1413.85 °C
2576.93 °F		-
Boiling point3538 K
3264.85 °C
5908.73 °F		-

Atomic properties

SiliconPhosphorus
Electronegativity (Pauling Scale)1.92.19
Electron affinity134.068 kJ/mol72.037 kJ/mol
Oxidation states−4, −3, −2, −1, 0, +1, +2, +3, +4
(an amphoteric oxide)		−3, −2, −1, 0, +1, +2, +3, +4, +5
(a mildly acidic oxide)
Ionization energies
  1. 786.5 kJ/mol
  2. 1577.1 kJ/mol
  3. 3231.6 kJ/mol
  4. 4355.5 kJ/mol
  5. 16091 kJ/mol
  6. 19805 kJ/mol
  7. 23780 kJ/mol
  8. 29287 kJ/mol
  9. 33878 kJ/mol
  10. 38726 kJ/mol
  11. 45962 kJ/mol
  12. 50502 kJ/mol
  13. 235196 kJ/mol
  14. 257923 kJ/mol
  1. 1011.8 kJ/mol
  2. 1907 kJ/mol
  3. 2914.1 kJ/mol
  4. 4963.6 kJ/mol
  5. 6273.9 kJ/mol
  6. 21267 kJ/mol
  7. 25431 kJ/mol
  8. 29872 kJ/mol
  9. 35905 kJ/mol
  10. 40950 kJ/mol
  11. 46261 kJ/mol
  12. 54110 kJ/mol
  13. 59024 kJ/mol
  14. 271791 kJ/mol
  15. 296195 kJ/mol

Electron configuration

SiliconPhosphorus
Shorthand configuration[Ne] 3s2 3p2 [Ne] 3s2 3p3
Full configuration1s2 2s2 2p6 3s2 3p2 1s2 2s2 2p6 3s2 3p3
Electrons per shell2, 8, 42, 8, 5

History

SiliconPhosphorus
PredictionAntoine Lavoisier (1787)
DiscoveryJöns Jacob Berzelius (1823)Hennig Brand (1669)
First isolationJöns Jacob Berzelius (1823)Hennig Brand (1669)
Named byThomas Thomson (1817)
Compare Silicon with
Compare Phosphorus with