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  2. Potassium oxide - Wikipedia

    en.wikipedia.org/wiki/Potassium_oxide

    For example, potassium oxide is about 83% potassium by weight, while potassium chloride is only 52%. Potassium chloride provides less potassium than an equal amount of potassium oxide. Thus, if a fertilizer is 30% potassium chloride by weight, its standard potassium rating, based on potassium oxide, would be only 18.8%.

  3. Template:List of oxidation states of the elements - Wikipedia

    en.wikipedia.org/wiki/Template:List_of_oxidation...

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  4. Potassium - Wikipedia

    en.wikipedia.org/wiki/Potassium

    Four oxides of potassium are well studied: potassium oxide (K 2 O), potassium peroxide (K 2 O 2), potassium superoxide (KO 2) [25] and potassium ozonide (KO 3). The binary potassium-oxygen compounds react with water forming KOH. KOH is a strong base. Illustrating its hydrophilic character, as much as 1.21 kg of KOH can dissolve in a single ...

  5. Oxidation state - Wikipedia

    en.wikipedia.org/wiki/Oxidation_state

    As an example, summing bond orders in the ammonium cation yields −4 at the nitrogen of formal charge +1, with the two numbers adding to the oxidation state of −3: The sum of oxidation states in the ion equals its charge (as it equals zero for a neutral molecule). Also in anions, the formal (ionic) charges have to be considered when nonzero.

  6. Periodic table - Wikipedia

    en.wikipedia.org/wiki/Periodic_table

    The overlaps get quite close at the point where the d-orbitals enter the picture, [50] and the order can shift slightly with atomic number [51] and atomic charge. [52] [h] Starting from the simplest atom, this lets us build up the periodic table one at a time in order of atomic number, by considering the cases of single atoms.

  7. Molecular orbital diagram - Wikipedia

    en.wikipedia.org/wiki/Molecular_orbital_diagram

    Molecular orbital diagram of NO. Nitric oxide is a heteronuclear molecule that exhibits mixing. The construction of its MO diagram is the same as for the homonuclear molecules. It has a bond order of 2.5 and is a paramagnetic molecule. The energy differences of the 2s orbitals are different enough that each produces its own non-bonding σ orbitals.

  8. Potassium peroxide - Wikipedia

    en.wikipedia.org/wiki/Potassium_peroxide

    Potassium peroxide is an inorganic compound with the molecular formula K 2 O 2. It is formed as potassium reacts with oxygen in the air, along with potassium oxide (K 2 O) and potassium superoxide (KO 2). Crystal structure. Potassium peroxide reacts with water to form potassium hydroxide and oxygen: 2 K 2 O 2 + 2 H 2 O → 4 KOH + O 2 ↑

  9. Period 2 element - Wikipedia

    en.wikipedia.org/wiki/Period_2_element

    A period 2 element is one of the chemical elements in the second row (or period) of the periodic table of the chemical elements.The periodic table is laid out in rows to illustrate recurring (periodic) trends in the chemical behavior of the elements as their atomic number increases; a new row is started when chemical behavior begins to repeat, creating columns of elements with similar properties.