Asdfghjklñ

What is an ionic bond?
A chemical bond in which one atom gives up an electron to another, forming two ions of opposite charge, and thus generating an electricalforce that holds the atoms together. The atoms are thus held together by the attractive force between a positively and a negatively charged ion.

What is acovalent bond?
A covalent bond is a bond between two non-metallic elements. This means that they share electrons inside the molecules. OR A type of chemical bondin which there is mutual sharing of electrons between two atoms is called covalent bond. It is furthur classified into single, double, and triple covalent bondwith respect to mutual sharing of one, two, and three bonds respectively. Their symbols are single, double, and triple lines between two atoms according to theirtype of covalent bond like one for single two for double and so on (e.g. Cl---Cl). The type of chemical bond in which one atom provides shared pair of electron forbond formation is called "Coordinate Covalent Bond".

Differences:
* They differ in their structure and properties.
* Covalent: A covalent bond is formedbetween two non-metals that have similar electronegativities.
* Ionic: An ionic bond is formed between a metal and a non-metal. Non-metals(-ve ion) are"stronger" than the metal(+ve ion) and can get electrons very easily from the metal.

http://www.youtube.com/watch?v=QqjcCvzWwww&feature=player_embeddedhttp://wiki.answers.com/Q/What_is_a_covalent_bond
http://wiki.answers.com/Q/What_is_an_ionic_bond
http://www.diffen.com/difference/Covalent_Bonds_vs_Ionic_Bonds