Question about chemical bonding?

Question

Apart from pure bonding between the same elements eg O-O and N-N [both sets purely covalently bonded] is it possible to have two or more different element types bonded together that are purely ionic or purely covalently bonded? if not why? Is NaCl purely an ionic bond?

Answer 1

In an ionic bond , the electron is transferred from the metal to the nonmetal. It is a complete transfer forming + and - ions.
NaCl is purely ionic, as are many ionc compounds.

Covalent or sharing bonds can be shared evenly as in N2 or unevenly as in H2O, polar covalent.
CH4, methane is purely covalent, and nonpolar, all shared evenly.

Answer 2

I think I get what you're asking, the answer is no I believe to ionic bonds but I wouldn't say that because a bond is polar it isn't "purely" covalent. Even diatomics have temporary dipoles.

But for ionic bonds, you have to compare the thermodynamics of ionizing the gases of the components and then freezing them in a lattice form. If those two things add up to the lattice energy, then it would be purely ionic, but I don't think anything matches exactly. The size of the ions does affect it though.

Answer 3

The distinction between covalent and ionic is ultimately somewhat arbitrary. The difference in the electronegativity of the bonded atoms is what ultimately determines the extent of electron transfer between two atoms. There is a complete and smooth gradation of electronegativity differences in compounds.

In part, behavior of the compound is used to define the point at which covalent bonding ends and ionic bonding begins, but the distinction is ultimately imperfect and somewhat arbitrary.

I think something like cesium fluoride would have the most perfect ionic bond, and everything else is somewhat less ionic.

Answer 4

Yes NaCl is a purely ionic bond. Ionic bonds usually occur between elements from the left side of the periodic table, which usually have positive charges and elements from the right side of the periodic table whose electronegativity is very large and they usually carry negative charges.

Elements of the same type cannot bond together ionically as their charges can not attract each other in that way. For instance in the case of sodium (Na), which has a +1 positive charge, this would repel another sodium ion since two positive charges repel each other, like in a magnet.

Same is true for chlorine, which has a -1 charge charge. Two negative charges repel each other.