What types of elements form covalent bonds?

Covalent bonds are a sharing of electrons; an even sharing of electrons results in a nonpolar covalent bond. Nonpolar bonds mostly exist between atoms of the same element. For example, oxygen contains six electrons in its outer shell. To gain a full outer shell of eight electrons, oxygen atoms form double bonds with other oxygen atoms. read more

The carbon-hydrogen bond organic materials require a covalent bond. These two elements form long chains that sometimes branch and have functional groups bonded to the chain. Breaking the covalent bond requires energy. In contrast, many ionic compounds readily dissociate when dissolved in water. read more

Covalent bonds are chemical bonds in which two or more elements join together by sharing electrons, rather than transferring electrons, as is the case with ionic bonds. These bonds tend to occur with nonmetal elements of the periodic table. Water is a familiar substance comprised of hydrogen and oxygen linked by covalent bonds. read more

Covalent bonds are a sharing of electrons; an even sharing of electrons results in a nonpolar covalent bond. Nonpolar bonds mostly exist between atoms of the same element. For example, oxygen contains six electrons in its outer shell. read more

Covalent bonds form between atoms of nonmetallic elements. In general, bonds are considered to be covalent if the electronegativity difference between the two atoms bonding is less than 2.0 Pauling units. read more