Plom
82
Pb
Grup
14
Període
6
Bloc
p
Protons
Electrons
Neutrons
82
82
125
Propietats Generals
Nombre atòmic
82
Massa atòmica
207,2
Nombre de massa
207
Categoria
Metalls post-transició
Color
Gris Pissarra
Radioactiu
No
From the Latin word plumbum
Estructura cristal·lina
Cara cúbica centrada
Història
Metallic lead beads dating back to 6400 BC have been found in Çatalhöyük in modern-day Turkey.
The Romans also used lead in molten form to secure iron pins that held together large limestone blocks in certain monumental buildings.
In alchemy, lead was thought to be the oldest metal and was associated with the planet Saturn.
The Romans also used lead in molten form to secure iron pins that held together large limestone blocks in certain monumental buildings.
In alchemy, lead was thought to be the oldest metal and was associated with the planet Saturn.
Electrons per capa
2, 8, 18, 32, 18, 4
Configuració electrònica
[Xe] 4f14 5d10 6s2 6p2
Pencil leads in wooden pencils have never been made from lead
Propietats Físiques
Fase
Sòlid
Densitat
11,342 g/cm3
Punt de fusió
600,61 K | 327,46 °C | 621,43 °F
Punt d'ebullició
2022,15 K | 1749 °C | 3180,2 °F
Entalpia de fusió
4,77 kJ/mol
Entalpia de vaporització
178 kJ/mol
Capacitat tèrmica específica
0,129 J/g·K
Abundància a l'escorça terrestre
0,00099%
Abundància a l'univers
1×10-6%
Número CAS
7439-92-1
Número CID de PubChem
5352425
Propietats Atòmiques
Radi atòmic
175 pm
Radi covalent
146 pm
Electronegativitat
2,33 (Escala de Pauling)
Potencial d'ionització
7,4167 eV
Volum atòmic
18,17 cm3/mol
Conductivitat tèrmica
0,353 W/cm·K
Estats d'oxidació
-4, 2, 4
Aplicacions
Large quantities of lead, both as the metal and as the dioxide, are used in storage batteries.
Lead is used as electrodes in the process of electrolysis.
It is added to brass to reduce machine tool wear.
Lead, in either pure form or alloyed with tin, or antimony is the traditional material for bullets and shot in firearms use.
Lead is used as electrodes in the process of electrolysis.
It is added to brass to reduce machine tool wear.
Lead, in either pure form or alloyed with tin, or antimony is the traditional material for bullets and shot in firearms use.
Lead and its compounds are poisonous
Isòtops
Isòtops estables
204Pb, 206Pb, 207Pb, 208PbIsòtops inestables
178Pb, 179Pb, 180Pb, 181Pb, 182Pb, 183Pb, 184Pb, 185Pb, 186Pb, 187Pb, 188Pb, 189Pb, 190Pb, 191Pb, 192Pb, 193Pb, 194Pb, 195Pb, 196Pb, 197Pb, 198Pb, 199Pb, 200Pb, 201Pb, 202Pb, 203Pb, 205Pb, 209Pb, 210Pb, 211Pb, 212Pb, 213Pb, 214Pb, 215Pb