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Cadmium

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by

Maheen Islam

on 22 October 2014

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Transcript of Cadmium

Transition metal in group 12
Row number 5
Atomic Number - 48
Atomic Mass - 112.4
Number of protons - 48
Number of electrons - 48
Number of neutrons - 64
Solid at room temperature


Chemical Properties
-burns in air to form cadmium oxide
-reacts slowly to oxygen
-does not react with water
-reacts with most acids
such as nitric acid and hydrochloric acid
-can release toxic fumes in powder form

Physical Properties
-density - 8.7 g/cm
-melting point - 321 C
-boiling point - 767 C
-it is a solid at room temperature
-crystalline structure - hexagonal closely packed
-soft, shiny, malleable, ductile
-good conductor of heat
Periodic Table Info
Cadmium is used...
-in rechargeable nickel-cadmium batteries
-to make control rods for nuclear reactors due to its easy absorption of neutrons
-over steel to prevent corrosion
-cadmium electro-plating is used in air crafts
-in producing pigments
-as stabilizers in plastics
Compounds
cadmium oxide: CdO
cadmium sulphide: CdS
cadmium selnide: CdSe
cadmium peroxide: CdO
cadmium dihydride: CdH
cadmium difluoride: CdF
cadmium dichloride: CdCl
cadmium diiode: CdI
Cadmium is found...
Natural
-as cadmium sulfide
-refining during zinc production
-associated with zinc
Man-Made
-through the usage of phosphate fertilizers
-in sewage sludge
-industrially
Cadmium - Cd
Cadmium Usage
Discovery
Chemistry Project
3
o
o
2
2
2
2
2
-by German chemist Fredrich Stromeyer and Karl Samuel Lebercht Hermann
-in 1817
-while examining calamine
-noticed a glowing yellow colour when heated
-realized that the new colour was in fact a new element
Resources
webelements.com
sciencelab.com
chemwiki.ucdavis.edu
education.jlab.org
cadmium.org
periodictable.com

by Maheen
Islam

Electron Configuration
Atomic Structure
Full transcript