14 Si Silicon 28.085 u

Silicon

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周期
3
族
14
ブロック
p-ブロック
相 (STP)
Solid

Silicon is the second most abundant element in Earth's crust after oxygen. It is the foundation of modern electronics and semiconductor technology.

外観: 結晶質で、青みがかった光沢

About Silicon

The foundation of modern electronics, silicon is a hard, crystalline metalloid whose semiconducting behavior underpins integrated circuits. It has atomic number 14 and an atomic mass of 28.085, a reflective surface with a bluish tinge, and a melting point of 1687 K. Four valence electrons ([Ne] 3s2 3p2) and an electronegativity of 1.90 favor a covalent, diamond-like lattice; its first ionization energy is 786.5 kJ/mol. Jöns Jacob Berzelius isolated the element in 1824. After oxygen, silicon is the second most abundant element in Earth's crust, occurring in sand and silicate minerals rather than free. It belongs to group 14, period 3, below carbon.

物理的特性

原子質量 28.085 u
密度 2.3296 g/cm³
融点 1413.8 °C
沸点 3264.8 °C
STPにおける相 Solid
原子半径 111.0 pm

電子的特性

電気陰性度 1.9
イオン化エネルギー 786.5 eV
電子親和力 133.6 eV
価電子 4

電子配置

配置 [Ne] 3s² 3p²

Electron Shell Configuration

Silicon electron shell configuration Si 2e⁻ 8e⁻ 4e⁻
Electron shell structure of Silicon — electrons per shell.
Shell Electrons
1 (K) 2
2 (L) 8
3 (M) 4

Position in Periodic Table

Silicon position in the periodic table Si

発見

発見者: Jons Jacob Berzelius
年: 1824

ブロックと周期

ブロック

s p d f

周期

1 2 3 4 5 6 7

周期表

ランタノイド アクチノイド

Si を含む反応

Formation of Silicon Dioxide

Si + O₂ → SiO₂

Synthesis

Compounds Containing Silicon

Silicon Dioxide

SiO₂

Sodium Silicate

Na₂SiO₃

Silane

SiH₄

Silicon Tetrachloride

SiCl₄

Calcium Silicate

CaSiO₃

Potassium Feldspar

KAlSi₃O₈

Kaolinite

Al₂Si₂O₅(OH)₄

Talc

Mg₃Si₄O₁₀(OH)₂

Silicon Carbide

SiC

Tetramethylsilane

Si(CH₃)₄

Magnesium Silicate

Mg₃Si₄O₁₀(OH)₂

Zeolite A

Na₁₂Al₁₂Si₁₂O₄₈

半金属 をもっと見る

5 B Boron 32 Ge Germanium 33 As Arsenic 51 Sb Antimony 52 Te Tellurium

Explore on Science FYI

MineralFYI
Quartz

Silicon dioxide (SiO₂) — most common silicate

Frequently Asked Questions

What is Silicon?
Silicon (Si) is a chemical element with atomic number 14. It is a solid at standard temperature and pressure, classified as a 半金属.
What are the key properties of Silicon?
Silicon has an atomic mass of 28.085 u, density of 2.3296 g/cm³, melting point of 1413.8°C, boiling point of 3264.8°C.
What is the electron configuration of Silicon?
The electron configuration of Silicon is [Ne] 3s2 3p2. It is in the p-block of the periodic table.
Who discovered Silicon?
Silicon was discovered by Jons Jacob Berzelius in 1824.
What is the electronegativity of Silicon?
Silicon has an electronegativity of 1.9 on the Pauling scale.