Plutonyo

Plutonium
94Pu
Sm ↑ Pu ↓ (Uqh) Periodic table neptunium ← plutonium → americium
Appearance
silvery white, tarnishing to dark gray in air
General properties
Name, simbolo, kaiphan	plutonium, Pu, 94
Pronunciation	Plantilya:IPAc-en Plantilya:Respell
Element category	aktinido
Group, period, block	[[group element|]], 7, f
Standard atomic weight	(244)
Electron configuration	[Rn] 5f6 7s2 2, 8, 18, 32, 24, 8, 2
History
Discovery	Glenn T. Seaborg, Arthur Wahl, Joseph W. Kennedy, Edwin McMillan (1940–1)
Physical properties
Phase	magahi
Density (near r.t.)	19.816 g·cm−3
Liquid density at m.p.	16.63 g·cm−3
Melting point	912.5 K, 639.4 °C, 1182.9 °F
Boiling point	3505 K, 3228 °C, 5842 °F
Heat of fusion	2.82 kJ·mol−1
Heat of vaporization	333.5 kJ·mol−1
Molar heat capacity	35.5 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 1756 1953 2198 2511 2926 3499
Atomic properties
Oxidation states	8, 7, 6, 5, 4, 3, 2, 1 (amphoteric oxide)
Electronegativity	1.28 (Pauling scale)
Ionization energies	1st: 584.7 kJ·mol−1
Atomic radius	159 pm
Covalent radius	187±1 pm
Miscellanea
Crystal structure	monoclinic
Magnetic ordering	paramagnetic
Electrical resistivity	(0 °C) 1.460 µΩ·m
Thermal conductivity	6.74 W·m−1·K−1
Thermal expansion	(25 °C) 46.7 µm·m−1·K−1
Speed of sound	2260 m·s−1
Young's modulus	96 GPa
Shear modulus	43 GPa
Poisson ratio	0.21
CAS registry number	7440-07-5
Most stable isotopes
Main article: Isotopes of plutonium
iso NA half-life DM DE (MeV) DP 238Pu trace 87.74 y SF 204.66 — α 5.5 234U 239Pu 100% 2.41 × 104 y SF 207.06 — α 5.157 235U 240Pu trace 6.5 × 103 y SF 205.66 — α 5.256 236U 241Pu syn 14 y β− 0.02078 241Am SF 210.83 — 242Pu trace 3.73 × 105 y SF 209.47 — α 4.984 238U 244Pu trace 8.08 × 107 y α 4.666 240U SF —

Ang plutonyo (Iningles plutonium) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Pu ug kaiphan nga atomik 94. Ang plutonyo mao ang aktinido.

Galeriya sa hulagway

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