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Date: 30-3-2019
855
Date: 9-10-2018
1013
Date: 20-12-2018
1021
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Silicon is a crystalline semi-metal or metalloid. One of its forms is shiny, grey and very brittle (it will shatter when struck with a hammer). It is a group 14 element in the same periodic group as carbon, but chemically behaves distinctly from all of its group counterparts. Silicon shares the bonding versatility of carbon, with its four valence electrons, but is otherwise a relatively inert element. However, under special conditions, silicon be made to be a good deal more reactive. Silicon exhibits metalloid properties, is able to expand its valence shell, and is able to be transformed into a semiconductor; distinguishing it from its periodic group members.
Symbol | Si |
Atomic Number | 14 |
Group | 14 (Carbon Family) |
Electron Configuration | [Ne]3s23p2 |
Atomic Weight | 28.0855 g |
Density | 2.57 g/mL |
Melting Point | 1414oC |
Boiling Point | 3265oC |
Oxidation States | 4, 3, 2, 1, -1, -2, -3, -4 |
Electronegativity | 1.90 |
Stable Isotopes | 28Si 29Si 30Si |
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10 دقائق قبل النوم.. هذا الأسلوب يساهم في تحسين يومك
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الأسباب الشائعة لتفريغ شحن البطارية
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شعبة التوجيه الديني النسوي تواصل تقديم الدورة التطويرية لتعليم مناسك الحج
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