| Ordnungszahl: |
33 |
| Name: |
Arsenic |
| Namensursprung: |
Greek: arsenikon; Latin: arsenicum, (both names for yellow pigment). |
| Entdeckung: |
Known to the ancients. |
| Beschreibung: |
Steel-gray, brittle semi-metal. |
| Vorkommen: |
Found in mispickel (arsenopyrite) |
| Verwendung: |
Many of its compounds are deadly poison and used as weed killer and rat poison. Conducts electricity. Used in semiconductors. Some compounds, called arsenides, are used in the manufacture of paints, wallpapers, and ceramics. |
| Gruppe: |
Non-Metal |
| Atomgewicht: |
74.92159 |
| Schmelzpunkt: |
817°C at 28 atmos. |
| Siedepunkt: |
Sublimes at 613°C |
| Dichte bei 293 K: |
5.72 g/cm³ |
| Aggregatszustand bei Raumtemperatur: |
Not Available |
| Schalen: |
2,8,18,5 |
| Orbitale: |
[Ar] 3d10 4s2 4p3 |
| Valenzen: |
-3,0,3,5 |
| 1. Ionisierungs- potential: |
9.8152 V |
| 2. Ionisierungs- potential: |
18.633 V |
| 3. Ionisierungs- potential: |
28.351 V |
| Atomradius: |
1.33 Å |
| Spezifische Wärme: |
0.33 J/gK |
| Verdampfungswärme: |
34.760 kJ/mol |
| Schmelzwärme: |
-- |
| Thermischer Ausdehnungskoeffizient: |
15.4 10-6 K-1 |
| Röntgenemission Energie / Wellenlänge: |
| |
KA |
KB |
LA |
LB |
MA |
MB |
|
|
|
| eV |
10532.1 |
11726.6 |
1282.05 |
1317.02 |
0 |
0 |
|
|
|
| Å |
1.17721 |
1.0573 |
9.67087 |
9.41409 |
0 |
0 |
|
|
|
|
| Röntgenabsorption Energie / Wellenlänge: |
| |
K |
L-I |
L-II |
L-III |
M-I |
M-II |
M-III |
M-IV |
M-V |
| eV |
11867 |
1527 |
1359 |
1324 |
0 |
0 |
0 |
0 |
0 |
| Å |
1.04479 |
8.11954 |
9.12328 |
9.36446 |
0 |
0 |
0 |
0 |
0 |
|
| Röntgen Fluoreszenz Ausbeute: |
| |
KA |
KB |
LA |
LB |
MA |
MB |
|
|
|
| |
56.8% |
0% |
1.2% |
0% |
0% |
0% |
|
|
|
|
| Nuklide: |
| |
Anteil |
Gewicht |
Spin |
Halbwertszeit |
Zerfallsmodus |
| As71 |
0% |
71 |
5/2 |
2.72d |
EC,β+ |
| As72 |
0% |
72 |
2 |
26.0h |
β+,EC |
| As73 |
0% |
73 |
3/2 |
80.3d |
EC |
| As74 |
0% |
73.924 |
2 |
17.78d |
EC,β+,β- |
| As75 |
100% |
74.9216 |
3/2 |
|
Stable |
| As76 |
0% |
75.922 |
2 |
26.3h |
β- |
| As77 |
0% |
76.921 |
3/2 |
38.8h |
β- |
|
