Mendeleev's Periodic Table > Si - Silicon

Si - Silicon

Silicon is the quintesential metalloid. Pure silicon is used for electronic devices, but the oxide and silicate minerals comprise more than a quarter of the earth's crust. Jöns Berzelius isolated silicon in 1823 in Stockholm by potassium fusion of quartz. Hydrolysis and condensation of substituted chlorosilanes can be used to produce a very great number of polymeric products, or silicones. These range from liquids to hard, glasslike solids with many useful properties. Elemental silicon transmits more than 95% of all wavelengths of infrared and and has been used in lasers to produce coherent light at 456 nm.

Atomic number	-	14		Density	g/mL	2	.33
Atomic weight	u	28	.0855	Melting point	K	1685
Bonding radius	A	1	.11	Boiling point	K	3540
Atomic radius	A	1	.46	Heat of vaporization	kJ/mol	384	.22
Ionization Potential	V	8	.151	Heat of fusion	kJ/mol	50	.55
Electronegativity	-	1	.9	Specific heat	J/gK	0	.71
The oxide is amphoteric.				Crystal are face centered cubic.
Electron config. : [Ne] 3s² 3p²

Isotopes of Si (Silicon):

MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	022 6 msec EC/ECp,13.980 Al-22/Mg-21 22.034525	024 102 msec EC/ECp,10.810 Al-24/Mg-23 24.011545	025 220 msec EC/ECp,12.741 Al-25/Mg-24 25.004106	026 2.234 sec EC,5.066 MeV Al-26 25.992329
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	027 4.16 sec EC,4.812 MeV Al-27 26.986704	028 92.23% Stable 27.976926	029 4.67% Stable 28.976494	030 3.10% Stable 29.973770
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	031 157.3 min B-,1.492 MeV P-31 30.975363	032 172 yr B-,13.020 MeV P-32 31.974148	033 6.18 sec B-,5.845 MeV P-33 32.978000	034 2.77 sec B-,4.601 MeV P-34 33.978575
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	035 0.78 sec B-,10.500 MeV P-35 34.984583	036 0.45 sec B-/B-n,7.850 P-36/P-35 35.986688	037 1 usec B-n,5.660 MeV P-36 36.993000

url: www.digitalexandria.com | mail:
Web Engineering: Alessandro Tugnoli, Alessandro Yoshi Polliotti, Daniele De Matteis | Graphic Design: Daniele De Matteis []
© 2003-2006 digitAlexandria