Question

when single atom provides both electrons which are needed for completion of covalent bond then it leads to __________​

Answer 1

Answer:

It leads to formation of ionic bonds

Answer 2

Answer:

when single atom provides both electrons which are needed for completion of covalent bond then it leads to covalent bond

A coordinate bond is a type of covalent bond where both of the electrons that form the bond originate from the same atom (more generally, a "dative" covalent bond).