Interactive periodic table with up-to-date element property data collected from authoritative sources. Look up chemical element names, symbols, atomic masses and other properties, …

PubChem is the world's largest collection of freely accessible chemical information. Search chemicals by name, molecular formula, structure, and other identifiers. Find chemical and …

Explore how density changes with atomic number in the periodic table of elements via interactive plots.

Acetaminophen (paracetamol), also commonly known as Tylenol, is the most commonly taken analgesic worldwide and is recommended as first-line therapy in pain conditions by the World …

Explore how atomic radius changes with atomic number in the periodic table of elements via interactive plots.

Explore how melting point changes with atomic number in the periodic table of elements via interactive plots.

Explore how electron affinity changes with atomic number in the periodic table of elements via interactive plots.

Water is an oxygen hydride consisting of an oxygen atom that is covalently bonded to two hydrogen atoms It has a role as an amphiprotic solvent, a member of greenhouse gas, a …

Methamphetamine is a member of the class of amphetamines in which the amino group of (S)-amphetamine carries a methyl substituent. It has a role as a neurotoxin, a psychotropic drug, a …

Of all the elements, gold in its pure state is undoubtedly the most beautiful. It is metallic, having a yellow color when in a mass, but when finely divided it may be black, ruby, or purple.