Ordnungszahl: |
96 |
Name: |
Curium |
Namensursprung: |
Named in honor of Pierre and Marie Curie. |
Entdeckung: |
1944 by G.T.Seaborg, R.A.James, A.Ghiorso in United States |
Beschreibung: |
Silvery, malleable, synthetic radioactive metal. |
Vorkommen: |
Made by bombarding plutonium with helium ions. So radioactive it glows in the dark. |
Verwendung: |
It has no significant commercial applications. |
Gruppe: |
Transition Metal |
Atomgewicht: |
(247.0703) |
Schmelzpunkt: |
1340°C |
Siedepunkt: |
-- |
Dichte bei 293 K: |
13.5 g/cm³ |
Aggregatszustand bei Raumtemperatur: |
Not Available |
Schalen: |
2,8,18,32,25,9,2 |
Orbitale: |
[Rn] 5f7 6d1 7s2 |
Valenzen: |
3,4 |
1. Ionisierungs- potential: |
6.02 V |
2. Ionisierungs- potential: |
-- |
3. Ionisierungs- potential: |
-- |
Atomradius: |
-- |
Spezifische Wärme: |
-- |
Verdampfungswärme: |
-- |
Schmelzwärme: |
15.0 kJ/mol |
Thermischer Ausdehnungskoeffizient: |
-- |
Röntgenemission Energie / Wellenlänge: |
|
KA |
KB |
LA |
LB |
MA |
MB |
|
|
|
eV |
0 |
0 |
0 |
0 |
0 |
0 |
|
|
|
Å |
0 |
0 |
0 |
0 |
0 |
0 |
|
|
|
|
Röntgenabsorption Energie / Wellenlänge: |
|
K |
L-I |
L-II |
L-III |
M-I |
M-II |
M-III |
M-IV |
M-V |
eV |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Å |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
Röntgen Fluoreszenz Ausbeute: |
|
KA |
KB |
LA |
LB |
MA |
MB |
|
|
|
|
0% |
0% |
0% |
0% |
0% |
0% |
|
|
|
|
Nuklide: |
|
Anteil |
Gewicht |
Spin |
Halbwertszeit |
Zerfallsmodus |
Cm241 |
0% |
241 |
1/2 |
32.8d |
EC,α |
Cm242 |
0% |
242.059 |
0 |
162.8d |
α |
Cm243 |
0% |
243.061 |
5/2 |
29.1y |
α,EC |
Cm244 |
0% |
244.063 |
0 |
18.1y |
α |
Cm245 |
0% |
245.066 |
7/2 |
8.5E03y |
α |
Cm246 |
0% |
246.067 |
0 |
4.76E03y |
α,SF |
Cm247 |
0% |
247.07 |
9/2 |
1.56E07y |
α |
Cm248 |
0% |
248.072 |
0 |
3.48E05y |
α,SF |
Cm249 |
0% |
249 |
1/2 |
1.069h |
β- |
Cm250 |
0% |
250 |
0 |
~9.7E03y |
SF | |