| Group | |||
|---|---|---|---|
| 1 | 2 | ||
| 3 |
11
Na
Sodium
[Ne] 3s1
|
||
| Period | 4 |
19
K
Potassium
[Ar] 4s1
Name origin:
the English word potash (kalium in Latin)
Atomic weight (amu):
39.0983
Specific heat capacity (J/gK):
0.757
Density (g/cm3):
0.862
Melting point (K):
336.53
Boiling point (K):
1032.0
Electronegativity (Pauling):
0.82
Abundance (mg/kg):
20900.0
|
20
Ca
Calcium
[Ar] 4s2
|
| 5 |
37
Rb
Rubidium
[Kr] 5s1
|
||
Tip: Hover over an adjacent element to compare its electron configuration to that of the central element.