Valence (chemistry)
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In chemistry, the valence or valency of an atom is a measure of its combining capacity with other atoms when it forms chemical compounds or molecules. Valence is generally understood to be the number
William Higgins' combinations of ultimate particles (1789)
Silicon
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Silicon is a chemical element; it has symbol Si and atomic number 14. It is a hard, brittle crystalline solid with a blue-grey metallic lustre, and is a tetravalent non-metal and semiconductor. It is
Valence (chemistry)
…of the elements 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Group → ↓ Period 1 1 H 2 He 2 3 Li 4 Be 5 B 6 C 7 N 8 O 9 F 10 Ne 3 11 Na 12 Mg 13 Al 14 Si 15 P 16 S 17 Cl 18 Ar 4 19 K 20 Ca 21 Sc 22 Ti 23 V 24 Cr 25 Mn 26 Fe 27 Co 28 Ni 29 Cu 30 Zn 31 Ga 32 Ge 33 As 34 Se 35 Br 36 Kr 5 37 Rb 38 Sr 39 Y…
Silicon Croda
Jöns Jacob Berzelius discovered silicon in 1823.
Single crystal of silicon grown by the Czochralski process used to make integrated circuits
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