Bly

82
Pb
Gruppe
14
Periode
6
Blok
p
Protons
Electrons
Neutrons
82
82
125
General Properties
Atomnummer
82
Atommasse
207,2
Mass Number
207
Kategori
Post-overgangsmetaller
Farve
Slate Gray
Radioactive
Nej
From the Latin word plumbum
Krystalstruktur
Fladecentreret Kubisk
History
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.
Elektroner i hver skal
2, 8, 18, 32, 18, 4
Elektronkonfiguration
[Xe] 4f14 5d10 6s2 6p2
Pb
Pencil leads in wooden pencils have never been made from lead
Physical Properties
Tilstandsform
Fast stof
Massefylde
11,342 g/cm3
Smeltepunkt
600,61 K | 327,46 °C | 621,43 °F
Kogepunkt
2022,15 K | 1749 °C | 3180,2 °F
Smeltevarme
4,77 kJ/mol
Fordampningsvarme
178 kJ/mol
Varmefylde
0,129 J/g·K
Abundance in Earth's crust
0,00099%
Abundance in Universe
1×10-6%
Ultrapure
Billede akkrediteringer: Images-of-elements
Ultrapure lead bead
CAS Number
7439-92-1
PubChem CID Number
5352425
Atomic Properties
Atomradius
175 pm
Kovalent radius
146 pm
Elektronegativitet
2,33 (Paulings skala)
Ionization Potential
7,4167 eV
Atomic Volume
18,17 cm3/mol
Varmeledningsevne
0,353 W/cm·K
Oxidationstrin
-4, 2, 4
Applications
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 and its compounds are poisonous
Isotoper
Stable Isotopes
204Pb, 206Pb, 207Pb, 208Pb
Unstable Isotopes
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