laura delascasas 8c

Does a connection or relationship exist between the reactivity of a metal and when it was discovered?

Laura Delascasas 8C

Reactivity Series and Periodic Table

METALS I am going to find out what is the relationship or the

connection between this metals.I will be looking at:1) Potassium2) Sodium3) Calcium4) Silver5) PlatinumI think that the metals at the bottom of the reactivity series

are discovered first because they are less reactive and for a metal to be more reactive is has to be in places where they don’t react therefore it would be harder to extract them earlier.

1. PotassiumProperties

The symbol for Potassium is (K). Potassium is a soft, silvery-white metal, member of the alkali group of the periodic chart. Potassium is silvery when first cut but it oxidizes rapidly in air and tarnishes within minutes, so it is generally stored under oil or grease. It is light enough to float into water with which it reacts instantly to release hydrogen, which burns with a lilac flame, the Melting point is 63.2 °C and it’s Boiling point is 760 °C its Atomic number is 19 its Atomic mass 39.0983 g.mol -1

Discovery Potassium metal was

first isolated by Sir. Humphery Davy in in 1807 AD, who obtained it through the electrolysis of very dry molten caustic potash It was first discovered in England

Potassium is used for

Potassium is used for Glass, Soap, Substitute for table salt,

Medical, Fertilizers, Gunpowder, Potassium nitrate,

chloride And permanganate.

2.SodiumProperties

The symbol for sodium is (NA). Sodium It’s a soft metal, reactive and with a low melting point, its melting point is 97.5 °C and its Boiling point is 883 °C its atomic number is 11 its atomic mass is 22.98977 g.mol -1

DiscoverySodium was discovered by Sir Humphrey Davy at 1807 in England. Sodium was first isolated in 1807 by Sir Humphry Davy, who made it by the electrolysis of very dry molten sodium hydroxide

Sodium is used for Sodium is used for Medicine, Agriculture,

Manufacture of organic compounds, To purify molten metals, Sodium carbonate / hydroxide soap cleaners Sodium bicarbonate / chloride / hypochlorite / nitrate / silicate

3.CalciumProperties

The symbol for calcium is (Ca), its atomic number is 20, its atomic mass is 40.08, its melting point is 840 °C, it’s boiling point is 1484 °C. Calcium is a soft, silvery metal in element form.

DiscoveryCalcium was discovered

by Sir Humphrey Davy at 1808 in England. Calcium metal was not isolated until 1808. After learning that Berzelius and Pontin prepared calcium amalgam by electrolysing lime in mercury, Sir Humphry Davy was able to isolate the impure metal.

Calcium is used for

Calcium is used for Dairy products are an excellent source of calcium. Deficiency can affect bone and teeth formation, Vitamin D is needed to absorb calcium, Reducing agent, Alloying agent used in the production of alloys Coral calcium , calcium carbonate, chloride, citrate, carbide, hydroxide

4.Silverproperties

The symbol for calcium is (AG) its atomic number is 47 and its atomic mass is 107.87 g.mol its melting point is 962 °C and its boiling point is 2212 °C. Silver is Pure silver is nearly white, lustrous, soft, very ductile, malleable, it is an excellent conductor of heat and electricity. It is not a chemically active metal, but it is attacked by nitric acid (forming the nitrate) and by hot concentrated sulfuric acid. It has the highest electrical conductivity of all metals, but its greater cost has prevented it from being widely used for electrical purposes.

DiscoverySilver was discovered by

Known since ancient times at no data is not known, Sometime prior to the autumn of 1803, the Englishman John Dalton was able to explain the results of some of his studies by assuming that matter is composed of atoms and that all samples of any given compound consist of the same combination of these atoms

Silver is used for Silver is used for Precious metal, Coinage,

Jewelry,Tableware, Dental alloys, Silver fulminate is an explosive, Photography,

5. PlatinumProperties

Platinum is a lustrous silvery-white, malleable, ductile metal its atomic number 78 and its atomic mass 195.09 g.mol -1 , its melting point is1772 °C and its boiling pint 3800 °C.

DiscoveryChabaneau first

obtained malleable platinum in 1789 in order to produce a chalice presented to Pius VI. It seems that the British chemist W. H. Wollaston was the first person to obtain a sample of pure platinum in the early 1800s

Platinum is used for Platinum is used for Used in catalytic

converters for automobiles, Making crucibles, Coating missile nose cones, Jet engine fuel nozzles, Medical treatments of cancer , 

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