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The 189 pages that link to Periodic table, each with the reason it gives.

• Atomic numberRelated: Its ordering makes atomic number the organizing principle of the elements.

• Electron configurationNarrower topic: Its blocks and periods reflect recurring patterns in electron configurations.

• Chemical elementRelated: Its modern form reflects the increasing number of identified elements.

• Valence electronRelated: For main-group elements, column position often indicates the number of valence electrons.

• Atomic orbitalRelated: Orbital filling explains the table’s blocks and recurring chemical trends.

• Pauli exclusion principleRelated: Electron filling under exclusion produces the recurring structure of the table.

• Superheavy elementNarrower topic: New superheavy elements test how far its patterns extend.

• PotassiumNarrower topic: Potassium’s position in Group 1 and Period 4 summarizes key patterns in its properties.

• ChlorineNarrower topic: Chlorine’s group and period help predict its electron structure and chemical behavior.

• CalciumNarrower topic: Calcium’s position places it in Group 2 and Period 4.

• Rare-earth elementNarrower topic: The lanthanides occupy a distinct series whose placement helps explain the group’s boundaries.

• SodiumNarrower topic: Sodium’s position in Group 1 and Period 3 predicts its chemical family and structure.

• OganessonRelated: Oganesson occupies group 18 and period 7, at the table’s lower-right edge.

• Alkali metalNarrower topic: Group 1 places these elements together because they share a single outer-shell electron.

• Ionization energyNarrower topic: Ionization energy follows recognizable patterns across periods and down groups.

• Noble gasNarrower topic: Group 18 places these elements together because their properties recur with similar outer-shell structures.

• Superheavy element synthesisNarrower topic: Each confirmed synthesis extends the experimentally established boundary of the table.

• LanthanideNarrower topic: The f-block placement makes the lanthanide series legible within element classification.

• Dmitri MendeleevNarrower topic: Mendeleev's table became the model for the modern arrangement of the elements.

• Electron shellRelated: Periods correspond to the filling of successive principal shells.

• Extended periodic tableNarrower topic: The extended table extrapolates the structure of this standard chemical reference.

• Periodic trendsNarrower topic: Its periods and groups are the directions along which periodic trends are measured.

• Aufbau principleRelated: Its blocks and recurring patterns reflect the order in which atomic subshells fill.

• Lanthanide contractionNarrower topic: The lanthanide series occupies a distinctive position in the table's sixth period.

• ActinideNarrower topic: The actinides form the lower of the two rows usually placed beneath the main table.

• CarbonNarrower topic: Carbon’s position in group 14 helps explain its four-valence-electron chemistry.

• Wolfgang PauliRelated: The exclusion principle explains the electron-shell structure underlying the table’s periodic patterns.

• Electron affinityNarrower topic: Electron affinity varies across the table, but the trends include notable exceptions.

• NihoniumNarrower topic: Nihonium occupies group 13 and period 7 in this arrangement.

• HalogenNarrower topic: Halogens occupy group 17, where similar outer-electron structures produce recurring properties.

• Octet ruleNarrower topic: For main-group elements, the group often indicates the number of valence electrons relevant to octet counting.

• Periodic lawRelated: Its rows and columns display the periodic patterns described by the law.

• William RamsayRelated: Ramsay’s gases filled a previously unrecognized group in the table.

• Jöns Jacob BerzeliusRelated: Reliable atomic weights of the kind Berzelius measured later helped organize elements systematically.

• TinNarrower topic: Tin’s group and period place it among elements with related chemical behavior.

• AtomNarrower topic: Its patterns arise largely from the electron structures of atoms.

• Atomic theoryRelated: Its organization reflects atomic structure and recurring electron configurations.

• BerylliumNarrower topic: Beryllium’s position among group 2 elements predicts some of its chemistry.

• Chemical symbolRelated: The table presents element symbols alongside names and atomic numbers.

• MetalloidNarrower topic: Metalloids cluster near the table’s zigzag boundary between metals and nonmetals.

• Relativistic chemistryNarrower topic: Relativistic effects explain departures from simple periodic trends among the heaviest elements.

• UnunenniumRelated: Element 119 would occupy the first position in period 8.

• Atomic radiusNarrower topic: Radius patterns help explain the table's recurring changes across rows and columns.

• Periodic table extensionCompared with: The confirmed table ends where experimental evidence stops; proposed extensions go beyond that boundary.

• Principal quantum numberRelated: The highest occupied principal shells help explain the table’s periods and recurring patterns.

• Relativistic effectNarrower topic: Relativistic effects become especially consequential among its heaviest elements.

• Transuranium elementRelated: The table places transuranium elements beyond uranium among the actinides and transactinides.

• Transactinide elementNarrower topic: Transactinides extend the table beyond its traditional actinide region.

• MoscoviumNarrower topic: Moscovium occupies group 15 and period 7 in the periodic table.

• PalladiumNarrower topic: Palladium’s position in period 5 and group 10 links it to neighboring transition metals.