protactinium

Summary

protactinium is a chemical element^[1]. protactinium draws 1,638 Wikipedia views per month (chemical_element category, ranking #95 of 144).^[2]

Key Facts

• protactinium is credited with the discovery of Kazimierz Fajans^[3].
• protactinium is credited with the discovery of Otto Hahn^[4].
• protactinium is credited with the discovery of Lise Meitner^[5].
• protactinium's instance of is recorded as chemical element^[6].
• actinium is named after protactinium^[7].
• protactinium's canonical SMILES is recorded as [Pa]^[8].
• protactinium's element symbol is recorded as Pa^[9].
• protactinium's chemical formula is recorded as Pa^[10].
• protactinium is part of period 7^[11].
• protactinium is part of actinide^[12].
• protactinium's Commons category is recorded as Protactinium^[13].
• protactinium's Unicode character is recorded as 鏷^[14].
• protactinium's time of discovery or invention is recorded as 1917^[15].
• protactinium's found in taxon is recorded as Paris polyphylla var. chinensis^[16].
• protactinium's topic's main category is recorded as Category:Protactinium^[17].
• protactinium's Commons gallery is recorded as Protactinium^[18].
• protactinium's atomic number is recorded as {'amount': '+91'}^[19].
• protactinium's electronegativity is recorded as {'amount': '+2'}^[20].
• protactinium's described by source is recorded as Armenian Soviet Encyclopedia^[21].
• protactinium's topic has template is recorded as Template:Infobox protactinium^[22].
• protactinium's mass is recorded as {'unit': 'Q483261', 'amount': '+231.03588'}^[23].
• protactinium's on focus list of Wikimedia project is recorded as Wikipedia:Vital articles/Level/4^[24].
• protactinium's ionic radius is recorded as {'unit': 'Q81454', 'amount': '+1.04'}^[25].
• protactinium's ionic radius is recorded as {'unit': 'Q81454', 'amount': '+0.90'}^[26].

Body

Definition and Type

protactinium's instance of is recorded as chemical element^[6].

Origins

actinium is named after protactinium^[7].

Use and Application

Part of include period 7^[11], a period^[27] and actinide^[12], a chemical series^[28].

Why It Matters

protactinium draws 1,638 Wikipedia views per month (chemical_element category, ranking #95 of 144).^[2] protactinium has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.^[29] protactinium is known by 31 alternative names across languages and contexts.^[30]