Property talk:P9998

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excitation energy
energy difference of an excited state from the ground state of its physical system

Represents	excitation energy (Q568593)
Data type	Quantity
Allowed values	0 ≤ 𝓧 ≤ not applicable
Allowed units	electronvolt (Q83327), kiloelectronvolt (Q28719934) or megaelectronvolt (Q72081071)
Example	nickel-54m (Q108839897) → 6,457.4 kiloelectronvolt Hoyle state (Q27624886) → 7,654.07 kiloelectronvolt technetium-99m (Q2373354) → 142.6836 kiloelectronvolt nickel-54 (Q18845090) → 0 electronvolt
See also	ionization energy (P2260)
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) Minimum and maximum Items with highest numeric value Items with lowest numeric value Database reports/Constraint violations/P9998 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 9 Main statement 5 55.6% of uses Qualifier 4 44.4% of uses

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Units: “electronvolt (Q83327), kiloelectronvolt (Q28719934), megaelectronvolt (Q72081071)”: value unit must be one of listed. (Help)

List of violations of this constraint: Database reports/Constraint violations/P9998#Units, hourly updated report

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/P9998#Scope, hourly updated report, SPARQL

Allowed entity types are Wikibase item (Q29934200): the property may only be used on a certain entity type (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/P9998#Entity types

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

List of violations of this constraint: Database reports/Constraint violations/P9998#Range, hourly updated report

Single value: this property generally contains a single value. (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/P9998#Single value, SPARQL

Item “subclass of (P279)”: Items with this property should also have “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/P9998#Item P279, SPARQL