Question

In which of the following substances does sharing of electrons between two atoms occur? A. KCl (l is supposed to be a lower case L) B. Ar C. Au D. Cr2O7^2- (Please answer quickly. Thank you in advance.)

Answer 1

Answer

• The correct option is D.  
• Cr2O7^2-

Explanation:

• The covalent bond between the two atoms formed when mutual sharing of electrons take place.
• As in dichromate ion, covalent bond is present which shows sharing of electrons between two atoms Cr and O.
• KCl is ionic bond, in this case, K completely donate electrons while Cl completely accept the electrons. So we can not say sharing of electrons.
• Ar and Au are present in free form, not forming bond with others atoms, so we cant say any sharing of electrons.