Key PointsIonic compound are developed from strong electrostatic interactions between ions, which result in higher melting points and also electrical conductivity compared to covalent compounds.Covalent compounds have bonds wherein electrons room shared in between atoms. As result of the share of electrons, they exhibition characteristic physics properties that encompass lower melting points and electrical conductivity contrasted to ionic compounds.

You are watching: Strength of chemical bonds from strongest to weakest

Termselectronegativity: The propensity of an atom or molecule to lure electrons and form bonds.octet rule: atom lose, gain, or share electrons in stimulate to have a complete valence level that eight electrons. Hydrogen and also helium room exceptions due to the fact that they have the right to hold a preferably of two valence electrons.valence electrons: electrons in the outermost principal energy (valence) level of an atom that have the right to participate in the development of chemical bonds with various other atoms.

Two class of Compounds

Compounds are defined as substances containing two or more different chemical elements. They have distinct chemical structures characterized by a fixed ratio of atoms organized together by chemistry bonds. Here, we talk about two classes of compounds based upon the bond form that hold the atoms together: ionic and covalent.

Covalent Compounds

Covalent binding are identified by the share of electrons in between two or much more atoms. This bonds mainly occur between nonmetals or in between two that the exact same (or similar) elements.Two atoms with similar electronegativity will not exchange an electron from your outermost shell; the atoms instead share electrons so the their valence electron shell is filled.

Examples the compounds that contain just covalent bonds room methane (CH4), carbon monoxide (CO), and iodine monobromide (IBr).

Covalent bonding in between hydrogen atomsSince every hydrogen atom has one electron, they are able to fill their outermost shells by sharing a pair of electrons through a covalent bond.

Ionic Compounds

Ionic bonding occurs once there is a huge difference in electronegativity between two atoms. This huge difference leads to the lose of one electron native the less electronegative atom and also the get of the electron by the more electronegative atom, causing two ions. This oppositely charged ions feel an attraction to each other, and also this electrostatic attraction constitutes an ionic bond.

Ionic bonding occurs between a nonmetal, i m sorry acts together an electron acceptor, and a metal, i beg your pardon acts as an electron donor. Metals have couple of valence electrons, whereas nonmetals have closer to eight valence electrons; to conveniently satisfy the octet rule, the nonmetal will accept one electron donated through the metal. Much more than one electron can be donated and received in an ionic bond.

Some examples of compounds with ionic bonding include NaCl, KI, MgCl2.

Formation of salt fluoride (NaF)The transfer of an electron from a neutral salt atom come a neutral fluorine atom creates two oppositely fee ions: Na+ and also F–. Attraction that the oppositely charged ion is the ionic bond in between Na and F.

See more: Who Emphasized That The Whole May Exceed The Sum Of Its Parts ”?

Effect on physics Properties

Covalent and ionic compounds deserve to be differentiated easily since of their different physical properties based on the nature of your bonding. Below are some differences:

At room temperature and normal atmospheric pressure, covalent compounds may exist together a solid, a liquid, or a gas, whereas ionic compounds exist just as solids.Although hard ionic compounds execute not conduct electricity due to the fact that there are no complimentary mobile ion or electrons, ionic compounds dissolved in water do an electrically conductive solution. In contrast, covalent compounds do not exhibit any type of electrical conductivity, either in pure kind or when dissolved in water.Ionic compounds exist in secure crystalline structures. Therefore, lock have higher melting and also boiling points contrasted to covalent compounds.

Boundless vets and curates high-quality, openly licensed content from about the Internet. This particular source used the complying with sources: