1. TRIAD OF IRON Iron - Fe Cobalt - Co Nickel -Ni
Veronika Mařáková
Gabriela Kalčíková
Petra Ženatová

2. Iron - Fe * Atomic Number: 26 * Atomic Mass: 55.845
* Melting Point: °C
* Boiling Point: °C
* Crystal Structure: Cubic
* Density 293 K: 7.86 g/cm3
* Color: Silvery
* Date of Discovery: Known to the ancients
* Discoverer: Unknown
* Name Origin: Latin
* Symbol Origin: From the Latin word ferrum (iron)

3. Obtained From  iron ores
Hematite
Pyrite
Magnetite

4. Compounds 2 major series of chemical compounds
 the bivalent iron (II)
 the trivalent iron (III)
For example:
FeSO4.7H2O ferrous sulfate heptahydrate
(green vitriol)
FeCl3.6H2O ferric chloride hexahydrate
Fe2O3 ferric oxide
KFe2(CN)6 prussian blue

5.  hemoglobin
Using *

6. Using
 steel industry

7. Forms of iron Pig iron  4-5% carbon, sulfur, silicon, phosphorus
Cast iron  2-4%carbon, 1-6% silicon, manganese
Carbon steel  0,5 and 1,5% carbon, manganese, sulfur, phosphorus, silicon
Wrought iron  0,2% carbon
Alloy steels  chromium, vanadium, molybdenum, nickel, tungsten
Iron (III)  use in magnetic storage in computers

8. Vocabulary alloy – slitina pig iron – surové železo cast iron – litina
wrought iron – tvářené železo
alloy steels – legovaná ocel
blast furnace – vysoká pec

9. Cobalt

10. Number of Energy Levels: 4
Characteristics
Name: cobalt
Symbol: Co
Atomic number: 27
Atomic weight:
Group number: 9
Period number: 4
Block: d-block
Number of Energy Levels: 4
First Energy Level: 2 Second Energy Level: 8 Third Energy Level: 15 Fourth Energy Level: 2

11. Physical and chemical characteristics
Standard state: solid at 298 K
Colour: lustrous, metallic, greyish tinge
Classification: Metallic
Availability: cobalt is available in many forms including pieces, powder, rod, and wire.
Reactivity :is lower then Fe,doesn´t corrode, dissolves in inorganic acids,reacts at high temperature with oxygen

12. Appaerance and Application
Cobalt is present in meteorites. Ore deposits are found in Zaire, Morocco and Canada
Compounds of cobalt were used to colorate glass
Cobalt is used for production of special steel

13. Dictionary available-dosažitelný rod-prut wire-drát ore-ruda
deposits-uloženy
Sources: , inorganic chemistry

14. Nickel Chemical Symbol: Ni Atomic Number: 28 Weight: 58.71
Melting Point: ºC
Boiling Point: ºC
Density: 8.90 g/cm3 at 25 ºC
Electron configuration: [Ar] 3d8 4s2

15. Nickel
The name nickel comes from the German word "kupfernickel" meaning Devil's copper or Old Nicholas's copper.
Nickel was used by the Chinese in naturally occuring nickel-copper alloys for over two thousand years.
In 1751 Swedish chemist, Alex Frederic Constedt, isolated the metal from niccolite ore.
Chinese nickel-copper candlesticks

16. Ni – chemical properties
in period 4, group 10 of the period. table
is transition metal
in compounds is almost exclusively in the +2 oxidation state
many nickel compounds dissolve fairly easy in water and have a green color
it forms compounds (↑t) with B, Si, P, S and halogens

17. Ni – physical properties and uses
silvery white, magnetic metal, hard, corrosion resistant, high electrical and thermal conductivities
is alloyed with other metals to improve their strength and resistance to corrosion
is also used to manufacture some types of coins and batteries
a single kilogram of nickel can be drawn into 300 kilometers of wire

18. Ni – dictionary Devil's copper – ďáblova měď
Naturally occuring – vyskytující se v přírodě
Candlestick - svícen
Niccolite ore – NiAs ruda
Transition metal – přechodný kov
Coins - mince
Wire - drát
Stainless steel – nerezavějící ocel
Dissolve fairly easy – rozpouští vcelku lehce
The Big Nickel in Sudbury, Ontario,