Chemistry
Articles about matter, substances, reactions and chemical science.
Potassium chromate
Potassium chromate (K2CrO4)
Potassium dichromate
Potassium dichromate: properties, uses, and safety
Potassium fluoride
Potassium hydroxide
Potassium hypomanganate
Potassium iodate
Potassium iodide
Potassium iodide (KI)
Potassium manganate
Potassium manganate (K2MnO4): properties, preparation and uses
Potassium nitrate
Potassium nitrate (saltpeter): properties, history, uses and safety
Potassium perchlorate
Potassium perchlorate (KClO4)
Potassium periodate
Potassium permanganate
Potassium sulfate
Potassium sulfate (K2SO4): properties, uses, and history
Potassium sulfide
Potassium sulfide (K2S): properties, preparation, and uses
Potassium sulfite
Praseodymium
Producer gas
Product (chemistry)
Promethium
Propane
Propellant
Propellant: substances and systems that produce thrust or pressure
Propene
Propene (propylene): properties, production, uses, and safety
Protactinium
Proton
Proton: Structure, Properties, and Role in Atomic Nuclei
Protonation
Prussian blue
Psilocybin
Purification
Purification: processes, methods, history and practical applications
Purine
Purine: structure and biological role in nucleic acids and metabolism
Purity
Pyrimidine
Pyrolysis
Pyrolysis: thermal decomposition of carbon-containing materials
Pyruvic acid
Pyruvic acid: structure, metabolism, and biological roles
Qualitative analysis
Qualitative analysis: identification of chemical substances
Quantitative analysis (chemistry)
Radioactive decay
Radiogenic
Radiogenic (radiogenic nuclides and isotopes)
Radionuclide
Radium
Radon
Rare earth element
Rare earth element (REE): overview, properties, uses and supply
Rate equation
Rate equation (rate law) in chemical kinetics
A concise account of the rate equation (rate law): its form, interpretation, relation to mechanism, common integrated laws, and practical uses in chemistry and engineering.
Rate-determining step
Rate-Determining Step (Chemical Kinetics)
Reaction
Reaction inhibitor
Reaction inhibitor (chemical and biochemical)
Reaction intermediate
Chemical Reaction Intermediates: Transient Species in Multistep Reaction Mechanisms
Reaction mechanism
Reaction mechanism: stepwise pathways of chemical reactions