define a covalent bond. how are these bonds formed? give an example of a compound held together by covalent…

Answer:

A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms. These bonds are formed when atoms share electrons to achieve a stable electron - configuration (usually a full outer shell). An example of a compound held together by covalent bonds is water ($H_2O$), where the oxygen atom shares electrons with two hydrogen atoms.

Brief Explanations:

In chemistry, atoms form covalent bonds to gain stability. Sharing electrons allows them to fill their outer electron shells. Water is a common example with oxygen and hydrogen sharing electrons.