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[1] [2] [3] Introduced by Gilbert N. Lewis in his 1916 article The Atom and the Molecule, a Lewis structure can be drawn for any covalently bonded molecule, as well as coordination compounds. [4] Lewis structures extend the concept of the electron dot diagram by adding lines between atoms to represent shared pairs in a chemical bond.
Powdered potassium sulfide anhydrous. Potassium sulfide is an inorganic compound with the formula K 2 S.The colourless solid is rarely encountered, because it reacts readily with water, a reaction that affords potassium hydrosulfide (KSH) and potassium hydroxide (KOH).
The pH of a sodium chloride solution remains ≈7 due to the extremely weak basicity of the Cl − ion, which is the conjugate base of the strong acid HCl. In other words, NaCl has no effect on system pH [ 32 ] in diluted solutions where the effects of ionic strength and activity coefficients are negligible.
Note: ρ is density, n is refractive index at 589 nm, [clarification needed] and η is viscosity, all at 20 °C; T eq is the equilibrium temperature between two phases: ice/liquid solution for T eq < 0–0.1 °C and NaCl/liquid solution for T eq above 0.1 °C.
The cis (Z) form of sodium hyponitrite can be obtained too, but it is more reactive than the trans form. [2] The cis hyponitrite anion is nearly planar and almost symmetric, with lengths of about 140 pm for N−O bond and 120 pm for the N−N bond, and O−N−N angles of about 119°.
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Left: The dot-and-cross diagram of the LDQ structure of ozone (O 3). The nuclei are as indicated and the electrons are denoted by either dots or crosses, depending on their relative spins. Right: Simplified diagram of the LDQ structure of O 3, showing electrons in non-coincident pairs using thin lines and a coincident electron pair using a ...
Daten aus / data from van Rossen, G.L.C.M.; van Bleiswijk, H.: Über das Zustandsdiagramm der Kalium-Natriumlegierungen in Z. Anorg. Chem. 74 (1912) 152-156 Legende: Na - Schmelzpunkt von reinem Natrium, K - Schmelzpunkt von reinem Kalium, E - Eutektikum, P - Peritektikum, blaue Linie - Schmelzpunkt der eutektischen Mischung, schwarze Linie - inkongruente Schmelze der Verbindung Na 2 K, rote ...