General | States | Energies | Oxidation & Electrons |Appearance & Characteristics
Reactions | Other Forms |Radius | Conductivity | Abundance
Encyclopedia Britannica articles


Name Plutonium Symbol Pu
atomic number 94 Atomic weight (244)
Density @ 293 K 19.8 g/cm3 Atomic volume 12.32 cm3/mol
Group Rare Earth, Actinides discovered 1940


state (s, l, g) s
melting point 914.2 K boiling point 3503 K
Heat of fusion 2.840 kJ/mol Heat of vaporization 344.0 kJ/mol
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1st ionization energy 585 kJ/mole electronegativity 1.3
2nd ionization energy kJ/mole electron affinity kJ/mole
3rd ionization energy kJ/mole Specific heat 0.13 J/gK
heat atomization 352 kJ/mole atoms

Oxidation & Electrons

Shells 2,8,18,32,24,8,2 electron configuration [Rn] 5f6 7s2
minimum oxidation number 0 maximum oxidation number 7
min. common oxidation no. 0 max. common oxidation no. 4
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Appearance & Characteristics

structure fcc: face-centered cubic color silvery
uses weapon fuel, pacemakers toxicity
hardness mohs characteristics Radioactive


reaction with air reaction with 6M HCl
reaction with 6M HCl reaction with 15M HNO3 passivated
reaction with 6M NaOH
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Other Forms

number of isotopes 0 hydride(s) PuH2 PuH3
oxide(s) PuO Pu2O3 PuO2 chloride(s) PuCl2 PuCl3


ionic radius (2- ion) pm ionic radius (1- ion) pm
atomic radius 159 pm ionic radius (1+ ion) pm
ionic radius (2+ ion) pm ionic radius (3+ ion) 114 pm
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thermal conductivity 6.3 J/m-sec-deg electrical conductivity 7.072 1/mohm-cm
polarizability 24.5 A^3


source Synthetic rel. abund. solar system log
abundance earth's crust log cost, pure $/100g
cost, bulk $/100g
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World Wide Web presentation of Chemicool Periodic Table is © Copyright 1996-99 by David D. Hsu. Some data were provided by and used with the permission of JCE Software and is owned and copyright by the Division of Chemical Education, Inc. Additional data were provided by Perkin-Elmer through Peter Lykos of IIT. The information may not be redistributed without the permission of David Hsu or JCE Software.