atom
Atom
One unit of an element.
Glossary
Glossary
Twenty common concepts, kept short so you can return to the article that gives each word a fuller context.
molecule
Molecule
A discrete group of bonded atoms.
element
Element
A kind of atom defined by proton number.
bond
Chemical bond
An interaction holding atoms together.
formula
Molecular formula
A count of atom types in a molecule.
structure
Molecular structure
Which atoms connect and how.
isotope
Isotope
Atoms of one element with different neutron counts.
proton
Proton
A positively charged particle in a nucleus.
electron
Electron
A negatively charged particle associated with an atom.
atomic-number
Atomic number
The number of protons in an atom.
compound
Compound
A substance made from more than one element.
mixture
Mixture
A physical combination of substances.
isomer
Isomer
A different structure with the same formula.
stereochemistry
Stereochemistry
The three-dimensional arrangement of atoms.
graph
Molecular graph
Atoms as nodes and bonds as edges.
smiles
SMILES
A text notation for molecular structure.
identifier
Identifier
A label used to distinguish a record.
descriptor
Descriptor
A calculated feature used in analysis.
fingerprint
Molecular fingerprint
A compact feature representation for comparison.
substructure
Substructure
A smaller pattern inside a structure.