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Compound of elements

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Compounds of elements

THIS ARTICLE WILL BE MUCH MORE EFFECTIVE WITH A PERIODIC TABLE OF THE ELEMENTS. IF AVAILABLE, HAVE ONE IN FRONT OF YOU. 

   An element is a molecule made of one type of atom. A compound of elements is a molecule of two different types of elements. A compound must be made in a definite ratio.There are three types of compounds: Ionic, Covalent, and Metallic.

Ionic 

  Made of one metal and one nonmetal. Forms a crystal with alternating positive and negative ions. STRONG BOND.File:Ionic compounds fig1.jpg


Covalent 

  Made of two nonmetals, which touch the zigzag line on the periodic chart.Forms a diatomic molecule, which shares electrons. WEAK BOND.

Metallic 

   Made of two metals, which are on the left of the periodic chart.. Forms a "sea of electrons"- a crystal of positive molecules with electrons flowing freely in between them. STRONG BOND. It can bend without breaking.
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