Periodic Table
|
| Promethium |
|
|
| Symbol: |
Pm
|
| Atomic
Number: |
61
|
| Atomicmass: |
(147) g.mol -1
|
| Electronegative
(According to Pauling): |
unknown
|
| Density: |
6.475 g.cm-3 at 20°C
|
| Melting
Point: |
1168 °C
|
| Boiling
Point: |
2460 °C
|
| Venderwaals
Radious: |
unknown
|
| Ionic
Radious: |
unknown
|
| Isotopes: |
9
|
| Electronic
Shell: |
[ Xe ] 4f5 6s2 |
|
| Energy
Of First Ionisation: |
534.6 kJ.mol -1
|
|
No of Protons |
| Standard
Potential: |
- 2.42 V
|
|
Electorn
in Full Shell |
| Discoverd
By: |
Discovered by Marinsky in 1945 |
|
Electorn
in Partial Shell |
| |
|
|
|
| |
FLW, Inc. provides ISO certified sales, service and
calibration for physical measurement, test & control.
