Page 36 - Curriculum Visions Dynamic Book

Ti see Titanium Tin (Sn)
Element 50.Tin is a soft, silvery- white or grey metal in group 4 (the carbon group) in the Periodic Table. Tin can easily be worked, but it has
no strength. Silvery coloured tin is crystalline.When it is bent, the crystal lattices break, resulting in a sound
that is like a scream.The grey form only occurs below 13.2°C.As a result, silvery tin can become grey in cold conditions.The change can be stopped by alloying with small amounts of antimony or bismuth.
Tin has been known since earliest times, when it was alloyed with coppe to make bronze.Tin is highly resistant to corrosion because, on exposure
to air, it forms a thin film of tin
oxide on its surface.Tin has a low melting point.
Key facts...
Name: tin
Symbol: Sn
Atomic number: 50
Atomic weight: 118.7
Position in Periodic Table: group 4 (14) (carbon
group); period 5
State at room temperature: solid
Colour: silvery-white or grey
Densities of solids: (white form) 7.28 g/cc; (grey
form) 5.75 g/cc
Melting point: 231.97°C
Boiling point: 2,270°C
Origin of name: from the Anglo-Saxon word tin;
the symbol Sn is from the Latin word stannum,
meaning tin
Shell pattern of electrons: 2–8–18–18–4
r
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Discovery
It is a very soft material on its own and had few uses; but when alloyed with copper, it produced harder bronze, hence beginning the Bronze Age, one of the most fundamental eras of human civilisation.
 If the tin plating on a tin can is stratched, the steel beneath is left vulnerable to corrosion.