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The 99 pages that link to Chemical element, each with the reason it gives.

• Periodic tableNarrower topic: Each position in the table represents one element.

• Atomic numberNarrower topic: Atomic number defines which element an atom belongs to.

• OxygenNarrower topic: Oxygen’s identity as element 8 rests on its proton count, not its chemical form.

• Chemical formulaNarrower topic: Element symbols in formulas identify which kinds of atoms a substance contains.

• Molecular formulaNarrower topic: Each element symbol identifies which kind of atom appears in the formula.

• OganessonNarrower topic: Oganesson is one element, defined by its proton count despite having multiple isotopes.

• ZincNarrower topic: Zinc is the element defined by 30 protons in each nucleus.

• GoldNarrower topic: Gold is element 79, distinguished by the 79 protons in each nucleus.

• Chemical nomenclatureNarrower topic: Element names are the basic vocabulary used to construct compound names.

• Mercury (element)Narrower topic: Mercury is element 80, defined by its 80 protons.

• Robert BunsenNarrower topic: Spectroscopy helped establish a new route to discovering and confirming chemical elements.

• GeochemistryNarrower topic: Element identities provide the basic units whose abundance and movement geochemistry tracks.

• Fraunhofer linesNarrower topic: Distinct spectral fingerprints let astronomers identify elements in the Sun and stars.

• NuclideNarrower topic: An element groups multiple nuclides that share one proton number.

• Periodic lawNarrower topic: The periodic law organizes the full set of known elements by recurring properties.

• Chemical symbolNarrower topic: Each chemical symbol names one element, distinguished by its atomic number.

• MetalloidNarrower topic: Metalloids are elements, not mixtures or compounds.

• TungstenNarrower topic: Tungsten’s atomic number identifies it as element 74.

• MixtureNarrower topic: Elements can be components of mixtures without being chemically transformed.

• Periodic table extensionNarrower topic: Periodic-table extension asks whether nuclei with still higher proton counts can be formed and characterized.

• TennessineNarrower topic: Tennessine is one element, distinguished from others by its proton count.

• Empirical formulaNarrower topic: Empirical formulas state the relative amounts of each element in a compound.

• YttriumNarrower topic: Yttrium is defined by the 39 protons in each of its atoms.

• GalliumNarrower topic: Gallium is defined by its 31 protons, regardless of its isotope or chemical form.

• Systematic element nameNarrower topic: Systematic names identify elements by their defining proton count.

• MolybdenumNarrower topic: Molybdenum is defined by its 42 protons, regardless of isotope or chemical compound.

• TerbiumNarrower topic: Terbium is the element whose atoms all contain 65 protons.

• Carl Gustaf MosanderNarrower topic: Mosander’s separations helped establish that rare-earth fractions contained distinct elements, not merely different compounds.

• Chemical element namingNarrower topic: The naming system applies to the members of this fundamental chemical category.

• OsmiumNarrower topic: Osmium’s recognition as a distinct element separated it from other metals in platinum ores.

• William Hyde WollastonNarrower topic: Palladium and rhodium became additions to the set of recognized elements.

• CaliforniumNarrower topic: Californium is one element in the periodic table.

• Chemical compositionNarrower topic: Elements are the fundamental identities recorded in a substance’s composition.

• Element naming controversyNarrower topic: A discovery claim concerns a new proton number, not merely a new isotope.

• GadoliniumNarrower topic: Gadolinium is the element whose atoms all contain 64 protons.

• NiobiumNarrower topic: Niobium is defined by its 41 protons, regardless of its chemical form.

• Actinide conceptNarrower topic: The series organizes a particular range of elements, not a distinct kind of substance.

• George de HevesyNarrower topic: A tracer remains part of its element's chemistry as its radioactive isotope is tracked.

• IUPAC nomenclature of inorganic chemistryNarrower topic: Element names and symbols form the vocabulary of inorganic compound names.

• Native element mineralNarrower topic: Most members are minerals made predominantly from a single element.

• Atomic emission spectroscopyNarrower topic: Each element's atomic structure gives it a characteristic pattern of emission lines.

• CaesiumNarrower topic: Caesium is one element among the 118 currently recognized.

• Native metalNarrower topic: Native metals consist of one chemical element, not a chemically bonded mineral compound.

• Per Teodor CleveNarrower topic: Cleve’s work helped establish holmium and thulium as distinct elements.

• UnbihexiumNarrower topic: Unbihexium would count as an element if atoms with 126 protons were established.

• Vladimir VernadskyNarrower topic: Vernadsky traced elements through minerals, organisms, and planetary environments.

• MeitneriumNarrower topic: Meitnerium is defined by its 109 protons, regardless of its isotope.

• MendeleviumNarrower topic: Mendelevium’s identity rests on its distinct proton number, despite its tiny production quantities.

• UnbiquadiumNarrower topic: Unbiquadium would be a distinct element if nuclei with 124 protons were confirmed.

• UnpenthexiumNarrower topic: Unpenthexium would count as a distinct element if nuclei with 156 protons were established.