Answer:
Two nonmetals with the same electronegativity will form a non polar covalent bond.
Explanation:
The type of bond between atoms is classified in 3 big groups:
- Metallic bond: this type of bond only take place between metallic atoms like Cu, Al, Au, etc.
- Ionic bond: this type of bond is formed between ions, that means that it is necessary the presence of a cation (ion with positive charge) and and an anion (ion with negative charge) and when the atoms has a very high difference of electronegativity (more that 2), that makes the ionic bond always polar, because there will be always a positive pole (cation) and a negative pole (anion). This is common between a metal and a nonmetal, for example: sodium chloride (NaCl).
- Covalent bond: this type of bond occurs when atoms share one or more pairs of electrons, this happens between nonmetals, e.g.: the molecule of chlorine gas (Cl₂).
Apart from that, depending on the electronegativity difference, the covalent bonds are clasified in polar and non polar:
- Polar covalent bond: the difference of electronegativity is important but less than an ionic bond (between 0 and 2).
- Non polar covalent bond: this occurs when the atoms forming bonds have the same electronegativity.
So, analyzing the statement, if we have two nonmetals it is a covalent bond, and if the two nonmetals atoms have the same electronegativity the bond will be non polar.
