Question

Which of the following represents a purely covalent bond?
Select one:
a. Ne – Ne
b. Na – Na
c. N – N
d. Ni – O

Answer 1

do you know which elements are Ne, Na, N, Ni, O ?

Answer 2

two of them are metals , one is a nobel gas, two are other non metals

Answer 3

a metal and non metal will form an ionic bond,
the nobel gas will not form any bond,
a metal will form a metallic bond with it self
and a covalent bond can be formed between non-metals