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Melting point: High, since melting means breaking covalent bonds (rather than merely overcoming weaker intermolecular forces). [ 5 ] Solid-phase electrical conductivity : Variable, [ 6 ] depending on the nature of the bonding: network solids in which all electrons are used for sigma bonds (e.g. diamond, quartz) are poor conductors, as there are ...
Like other chlorosilanes or silanes, silicon tetrachloride reacts readily with water: . SiCl 4 + 2 H 2 O → SiO 2 + 4 HCl. The reaction can be noticed on exposure of the liquid to air, as SiCl 4 vapour produces fumes as it reacts with moisture to give a cloud-like aerosol of silica and hydrochloric acid. [6]
When it is converted to the covalent red phosphorus, the density goes to 2.2–2.4 g/cm 3 and melting point to 590 °C, and when white phosphorus is transformed into the (also covalent) black phosphorus, the density becomes 2.69–3.8 g/cm 3 and melting temperature ~200 °C. Both red and black phosphorus forms are significantly harder than ...
In chemistry, a formula unit is the smallest unit of a non-molecular substance, such as an ionic compound, covalent network solid, or metal. [1] [2] It can also refer to the chemical formula for that unit. Those structures do not consist of discrete molecules, and so for them, the term formula unit is used.
"The Enormous Radio" represents a significant advance in Cheever's "style, fictive voice, and tone." [5] Biographer Patrick Meanor writes: "The Enormous Radio" and "Torch Song", much longer, more psychologically sophisticated stories, eventually came to be to be considered two of Cheever's greatest and most popular works, not only for his new, highly developed lyrical style and brilliant ...
The Things won the 2011 Shirley Jackson Award for Best Short Story, [1] and was a finalist for the 2011 Hugo Award for Best Short Story, [2] the 2011 Theodore Sturgeon Memorial Award, [3] and the 2011 BSFA Award for Best Short Fiction. [4] The audio version was a finalist for the 2010 Parsec Award for short fiction. [5]
Silicon–oxygen single bonds are longer (1.6 vs 1.4 Å) but stronger (452 vs. about 360 kJ mol −1) than carbon–oxygen single bonds. [1] However, silicon–oxygen double bonds are weaker than carbon–oxygen double bonds (590 vs. 715 kJ mol −1 ) due to a better overlap of p orbitals forming a stronger pi bond in the latter.
It decomposes above −30 °C (242 K) to sulfur dichloride and chlorine.. SCl 4 → SCl 2 + Cl 2. It hydrolyzes readily: SCl 4 + H 2 O → SOCl 2 + 2 HCl. Sulfur tetrachloride reacts with water, producing hydrogen chloride and sulfur dioxide through the hydrolysis process.
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