A template of a Venn diagram representing common and differentiating characteristics of covalent and ionic bonds is shown. Two overlapping circles are shown. On top of the left-hand circle Ionic Bond is written and on top of the right-hand circle Covalent bond is written. The non-overlapping space on the left is marked A, the overlapping space is marked B and the non-overlapping space on the right is marked C.

Which of the following characteristics can be written only in space A?

Formed between atoms of similar electronegativities
Formed between two metal atoms mostly found on the left of the periodic table
Formed between two non-metal atoms mostly found on the right of the periodic table
Formed between an atom that tends to lose electrons and an atom that tends to gain electrons