Description & History
he·li·um (1872):
a light colorless nonflammable gaseous element found especially in natural gases and used chiefly for inflating airships and balloons, for filling incandescent lamps, and for cryogenic research
|
|
Element
| Symbol | He |
| Z | 2 |
| Atomic Weight | 4.00299978 |
|---|
| Density | 0.000178500006 |
|
Edge Energies
(keV)
| K | 0.0250000004 |
|---|
| L1 | 0. |
|---|
| L2 | 0. |
|---|
| L3 | 0. |
|---|
| M | 0. |
|---|
| K-alpha | 0. |
|---|
| K-beta | 0. |
|---|
| L-alpha | 0. |
|---|
| L-beta | 0. |
|---|
|
Edge jumps
| Edge jumps can not be calculated for z < 10 |
|---|
|
Fluorescence
yield
| K | 0. |
|---|
| L1 | 0. |
|---|
| L2 | 0. |
|---|
| L3 | 0. |
|---|
|
