| Group | ||||
|---|---|---|---|---|
| 1 | 2 | 13 | ||
| 1 |
2
He
Helium
1s2
|
|||
| Period | 2 |
3
Li
Lithium
[He] 2s1
|
4
Be
Beryllium
[He] 2s2
Name origin:
the Greek name for beryl, 'beryllo'
Atomic weight (amu):
9.012182
Specific heat capacity (J/gK):
1.825
Density (g/cm3):
1.85
Melting point (K):
1560.0
Boiling point (K):
2742.0
Electronegativity (Pauling):
1.57
Abundance (mg/kg):
2.8
|
5
B
Boron
[He] 2s2 2p1
|
| 3 |
12
Mg
Magnesium
[Ne] 3s2
|
|||
Tip: Hover over an adjacent element to compare its electron configuration to that of the central element.