TIN AND LEAD
| SYMBOL | ATOMIC WEIGHT | DENSITY | MELTING POINT | COMMON OXIDES | |
| Tin | Sn | 119.0 | 7.35 | 235° | SnO SnO2 |
| Lead | Pb | 206.9 | 11.38 | 327° | PbO Pb3O4 PbO2 |
The family. Tin and lead, together with silicon and germanium, form a family in Group IV of the periodic table. Silicon has been discussed along with the non-metals, while germanium, on account of its rarity, needs only to be mentioned.
The other family of Group IV includes carbon, already described, and a number of rare elements.