Property talk:P1122

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spin quantum number
dimensionless rational quantum number; the intrinsic spin angular momentum divided by the Dirac constant

Description	spin quantum number (Q3879445) of a subatomic particle (Q177013).
Represents	spin quantum number (Q3879445)
Data type	Quantity
Domain	According to this template: all subatomic particles According to statements in the property: particle (Q1621273) or isotope (Q25276) When possible, data should only be stored as statements
Allowed values	According to this template: non-negative multiples of ½ According to statements in the property: 0 ≤ 𝓧 ≤ 20 When possible, data should only be stored as statements
Example	electron (Q2225) → 0.5 Higgs boson (Q402) → 0
Tracking: usage	Category:Pages using Wikidata property P1122 (Q118210248)
Lists	Items with the most statements of this property Count of items by number of statements (chart) Items with the most statements Items with the fewest statements Count of items by number of sitelinks (chart) Items with the most sitelinks Items with the most sitelinks, but no link to one Wikipedia (sample: Welsh Wikipedia, cywiki) Items with the fewest sitelinks Most linked wikis Items with the most identifier properties Items with no other statements Most recently created items Items with novalue claims Items with unknown value claims Usage history (total) Usage history (main statement) Chart by item creation date Minimum and maximum Items with highest numeric value Items with lowest numeric value User:Laboramus/Units/P1122 (Units used) Database reports/Constraint violations/P1122 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 3,178 Main statement 3,176 >99.9% of uses Qualifier 2 <0.1% of uses

[create Create a translatable help page (preferably in English) for this property to be included here]

Range from “0” to “20”: values should be in the range from “0” to “20”. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P1122#Range

Single value: this property generally contains a single value. (Help)

List of violations of this constraint: Database reports/Constraint violations/P1122#Single value, hourly updated report, SPARQL

Type “particle (Q1621273), isotope (Q25276)”: item must contain property “subclass of (P279)” with classes “particle (Q1621273), isotope (Q25276)” or their subclasses (defined using subclass of (P279)). (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P1122#Type Q1621273, Q25276, SPARQL

No bounds: values can't have any bounds (e.g. 1 not 1±0) (Help)

List of violations of this constraint: Database reports/Constraint violations/P1122#No Bounds, hourly updated report, SPARQL

Scope is as main value (Q54828448): the property must be used by specified way only (Help)

List of violations of this constraint: Database reports/Constraint violations/P1122#Scope, hourly updated report, SPARQL

This property is being used by: hy:Կաղապար:Տեղեկաքարտ Տարրական մասնիկ ca:Plantilla:Infotaula de partícula, ca:Plantilla:Infotaula isòtop Please notify projects that use this property before big changes (renaming, deletion, merge with another property, etc.)

why limited to particles?

Spin quantum number equally applies to nuclei, atoms and molecules (ground states or particular excited states), and also to quasiparticle states in solids and similar quantum phenomena. I don't understand why this property is limited to particles (subclasses of particle (Q1621273) - and in the description it says subatomic particles, subatomic particle (Q177013)). I think we should remove the constraint, or at least add other suitable top-level items to the constraint if that makes more sense. A similar issue exists for parity quantum number (P1123). Also the range limit isn't really right - just randomly checking, bismuth-205 has a ground-state spin of 9/2 and I believe there are others even higher. ArthurPSmith (talk) 21:04, 5 November 2015 (UTC)

Tobias1984
Snipre
Physikerwelt
Pamputt
Petermahlzahn
Jibe-b
Restu20
Daniel Mietchen
TomT0m
ArthurPSmith
Mu301
Sarilho1
SR5
DavRosen
Danmichaelo
Ptolusque
PhilMINT
Malore
Thibdx
Ranjithsiji
Niko.georgiev
Simon Villeneuve
Toni 001
Marc André Miron
DePiep
RShigapov
CarlFriedberg
Crocodilecoup
Mkomboti
Amorenobr (talk) 01:27, 3 August 2022 (UTC)
Valverde667 (talk) 16:07, 4 August 2022 (UTC)
fgnievinski

Notified participants of WikiProject Physics

I've modified the constraint to allow isotopes to have this property. Also greatly increased the allowed range, as many nuclides have quite high spin quantum numbers. ArthurPSmith (talk) 00:26, 26 June 2016 (UTC)

Is there a way to represent classes of numbers?

This property allows to use only numbers. How can I indicate that bosons have integer spins and fermions half-integer spins?--Malore (talk) 17:56, 27 April 2018 (UTC)