element.nameElectron Panel Modal created by GPPT Lab91Atom NumberPaSymbolProtactiniumNameActinideCategory3.0GroupSolidPhaseDiscovered ByWilliam Crookes1913Year231.036uAtomic Mass0.000kJ/molMolar Heat243.00Atomic Radius3.0Groupg/cm315.370Density7.0Period4300.000°KBoil1841.000°KMelt
Electrons>element.nameElectron shell created by GPPT Lab contact@gppt.tnPa91
Protons and Neutronselement.nameElectron shell created by GPPT Lab contact@gppt.tn91 neutron91 Proton
Electrons Arrangement6s6p6d7s7p5s5p5d5f4s4p4d4f3s3p3d2s2p1s7d7g7f7h7i6g6f6h5gLevel 1Level 2Level 3Level 4Level 5Level 6Level 7
ElectronProtonNeutronIsotopes91919191%91{n}91%{{n}Copyright © 2023, All Right Reserved Tidjma.tn
Big Bang Model10–43Température (°C)بلازما الكواركات والغلوناتquarks , electrons and gluons soupSoupe de quarks, électrons et gluonsتكوين ذرات الهيدروجين والهيليومHydrogen & Helium, Atomes FormationFormation des Atomes d'Hydrogène & Hélium010–3210–610131081030-200-2701024101510910271061012101810211028131 second3 minutes300 000300 000 Years1 Billion Years1By5By10By13ByPresent104ظهور الإنسانAppearance of manApparition de l'homme9 Byتشكيل النظام الشمسيFormation of the solar systemFormation du système solaire13.6 Age o Universبداية تشكل النجوم والمجراتBeginning of formation of stars and galaxiesDébut de formation des Etoiles et Galaxiesتشكيل البروتون النوترونProton Neutron FormationFormation des Protons et Neutronsظهور الفوتوناتPhotons ApparitionApparition des Photonsانقراض الديناصوراتExtinction of the DinosaursExtinction des DinosauresCopyright © 2023, All Right Reserved Tidjma.tnCopyright © 2023, All Right Reserved Tidjma.tn
nm400450500550600650700
>ROYGBV38045038057062075059010241022102010181016101410121010108106104102100ν (Hz)10810610410210010-210-410-610-810-1010-1210-1410-16Visible SpectrumIncreasing Wavelength (λ)λ (m)Increasing Frequency (ν)Copyright © 2023, All Right Reserved Tidjma.tnCopyright © 2023, All Right Reserved Tidjma.tnγ raysX raysUVIRMicrowaveFMAMEHFLong Radio WavesSHFUHFVHFHFMFLF
Protactinium is a chemical element with symbol Pa and atomic number 91. It is a dense, silvery-gray metal which readily reacts with oxygen, water vapor and inorganic acids. It forms various chemical compounds where protactinium is usually present in the oxidation state +5, but can also assume +4 and even +2 or +3 states.
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