Properties of silicon atoms

Ionisation Energies and electron affinity

The electron affinity of silicon is 133.6  kJ mol-1. The ionisation energies of silicon are given below.

Ionisation energy number Enthalpy /kJ mol-1
1st 786.5
2nd 1577.1
3rd 3231.6
4th 4355.5
5th 16091
6th 19805
7th 23780
8th 29287
9th 33878
10th 38726
11th 45962
12th 50502
13th 235195
14th 257922

Ionisation energies of Si

Electronic configuration

The following represents the electronic configuration and its associated term symbol for the ground state neutral gaseous atom. The configuration associated with silicon in its compounds is not necessarily the same.

Pointer to The Orbitron gallery of orbitals.

Kossel shell structure of Si
A schematic representation of the shell structure of silicon - not what the atom of silicon "looks like".

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silicon atomic number