Plutonium 94

Atomic No. Order:

Alphabetic Order:

Periodic Table

2, 8, 18, 32,

24, 8, 2

Sm
62

Pu
94

Uqq
144

Ueq
194

Plutonium

Atomic Number

Relative Atomic Mass
¹²C = 12.0000

[ 244 ]
244.0642

Significant Atomic Mass

241
Neutrons 147

Atomic Radius pm

First Ionisation Energy
kJ mol ^-1

585

Electronegativity

1.28

Density kg m ^-3

19840 (±) [298 K]
16623 [l., m.p.]

Molar Volume cm ³

12.3

Thermal Conductivity
W m ^-1 K ^-1

6.74 [300 K]

Melting Point K

914

Boiling Point K

3505

Number of Isotopes

236 Pu 2.87 year
237 Pu 45.7 day
238 Pu 87.7 year
239 Pu 2.410x10⁴ year
240 Pu 6.56x10³ year
241 Pu 14.4 year
242 Pu 3.75x10⁵ year
243 Pu 4.956 h
244 Pu 8.00x10⁷ year
245 Pu 10.5 h

Inner + outer Shells

Inner + outer Orbitals

Filling Orbital

5f ⁶

Ground State Electron Configuration

[Rn]

5f ⁶

6p ⁶ 7s ²

Ground State Electron Configuration with
free Orbitals (n= 24 )

0, 0, 0, 0, 8, 10, 6

Ground State Electron Configuration with compressed Orbitals (n=162 )

0, 0, 0, 0, 18, 54, 90

Singularity

280

162

	s	p	d	f		g	h	i	j
1	2
2	2	6
3	2	6	10
4	2	6	10	14
5	2	6	10	6	8	18
6	2	6	10	14		18	22
7	2	6	10	14		18	22	26
8

Term Symbol

⁷F ₀

CAS Reg-ID:

7440-07-5

Discovery

Discovered by G.T. Seaborg, J.W. Kennedy and A.C. Wahl (Berkeley, USA) in 1940

Name Derived From

Named after the planet Pluto

Plutonium and all elements of higher atomic number are radiological poisons because of their high rate of alpha emission and their specific absorption in bone marrow. The maximum amount of plutonium-239 that can be indefinitely maintained in an adult without significant injury is 0.008 microcuries (equal to 0.13 micrograms).

APSIDIUM

Created:

2002-08-28

094.pdf

Page update:

2006-11-05