Kobber

29
Cu
Gruppe
11
Periode
4
Blokk
d
Protoner
Elektroner
Nøytroner
29
29
35
Generelle egenskaper
Atomnummer
29
Atomvekt
63,546
Massetall
64
Kategori
Transisjonsmetaller
Farge
Kobber
Radioaktiv
Nei
From the Latin word cuprum, from the island of Cyprus
Krystallstruktur
Face Centered Cubic
Historie
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 per energinivå
2, 8, 18, 1
Elektronkonfigurasjon
[Ar] 3d10 4s1
Cu
Pure copper is orange-red and acquires a reddish tarnish when exposed to air
Fysikalske egenskaper
Fase
Fast stoff
Tetthet
8,96 g/cm3
Smeltepunkt
1357,75 K | 1084,6 °C | 1984,28 °F
Kokepunkt
2835,15 K | 2562 °C | 4643,6 °F
Smeltevarme
13,1 kJ/mol
Fordampningsvarme
300 kJ/mol
Spesifikk varmekapasitet
0,385 J/g·K
Forekomst i jordskorpa
0,0068%
Forekomst i universet
6×10-6%
Macro
Bildekreditter: Wikimedia Commons (Jonathan Zander)
Macro of native copper
CAS Number
7440-50-8
PubChem CID Number
23978
Atomegenskaper
Atomradius
128 pm
Kovalent radius
132 pm
Elektronegativitet
1,9 (Pauling-skalaen)
Ioniseringsenergi
7,7264 eV
Molart volum
7,1 cm3/mol
Termisk ledningsevne
4,01 W/cm·K
Oksidasjonstilstander
1, 2, 3, 4
Bruksområder
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
Stabile isotoper
63Cu, 65Cu
Ustabile isotoper
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