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Periodic table comprises of almost 118 elements which have their own differences. The element in the periodic table are arranged according to the increasing number of its' proton number. The table differentiate the properties of metal, semi metal and non-metal. There are 18 vertical lines called group and 7 horizontal lines called period. Most pre-referred group are alkali metal, halogen and noble gases.
Ionic compound and covalent compound. Atom will release electron to form ion either positive (cation ) or negative(anion) charges.

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