Kobber

29
Cu
Gruppe
11
Periode
4
Blok
d
Protons
Electrons
Neutrons
29
29
35
General Properties
Atomnummer
29
Atommasse
63,546
Mass Number
64
Kategori
Overgangsmetaller
Farve
Copper
Radioactive
Nej
From the Latin word cuprum, from the island of Cyprus
Krystalstruktur
Fladecentreret Kubisk
History
Copper occurs naturally as native copper and was known to some of the oldest civilizations on record.

Earliest estimates of the discovery of copper suggest around 9000 BC in the Middle East.

It was one of the most important materials to humans throughout the copper and bronze ages.
Elektroner i hver skal
2, 8, 18, 1
Elektronkonfiguration
[Ar] 3d10 4s1
Cu
Pure copper is orange-red and acquires a reddish tarnish when exposed to air
Physical Properties
Tilstandsform
Fast stof
Massefylde
8,96 g/cm3
Smeltepunkt
1357,75 K | 1084,6 °C | 1984,28 °F
Kogepunkt
2835,15 K | 2562 °C | 4643,6 °F
Smeltevarme
13,1 kJ/mol
Fordampningsvarme
300 kJ/mol
Varmefylde
0,385 J/g·K
Abundance in Earth's crust
0,0068%
Abundance in Universe
6×10-6%
Macro
Billede akkrediteringer: Wikimedia Commons (Jonathan Zander)
Macro of native copper
CAS Number
7440-50-8
PubChem CID Number
23978
Atomic Properties
Atomradius
128 pm
Kovalent radius
132 pm
Elektronegativitet
1,9 (Paulings skala)
Ionization Potential
7,7264 eV
Atomic Volume
7,1 cm3/mol
Varmeledningsevne
4,01 W/cm·K
Oxidationstrin
1, 2, 3, 4
Applications
Copper is often used for electrical wiring applications and for household plumbing applications.

Copper sulfate is used as a fungicide and as an algicide in rivers, lakes and ponds.

It is also used in cookware and cooking utensils.

Commercially important alloys such as brass and bronze are made with copper and other metals.
Cooking acidic food in copper pots can cause toxicity
Isotoper
Stable Isotopes
63Cu, 65Cu
Unstable Isotopes
52Cu, 53Cu, 54Cu, 55Cu, 56Cu, 57Cu, 58Cu, 59Cu, 60Cu, 61Cu, 62Cu, 64Cu, 66Cu, 67Cu, 68Cu, 69Cu, 70Cu, 71Cu, 72Cu, 73Cu, 74Cu, 75Cu, 76Cu, 77Cu, 78Cu, 79Cu, 80Cu