The bond between two oxygen atoms (a molecule of oxygen air) has two characteristics. what are they? a. valence electrons are shared between oxygen atoms. b. a double covalent bond is formed. c. an ionic bond is formed. d. a triple covalent bond is formed.

. Valence electrons are shared between oxygen atoms.

B.A double covalent bond is formed.

Explanation: Oxygen has atomic number 8 and is come under group 6.

Number of electrons in the outer most shell are known as Valence electrons of that atom.Oxygen has 6 Valence electrons and the valency of oxygen atom is 2. That's mean it can share 2 of its electrons to form a bond.

So , total valency in O2 molecule is 4. Each of the oxygen molecule share it's 2 electrons and form double covalent bonds.

By sharing two electrons by each of the oxygen atom it's outermost shell filled and it became stable oxygen molecule ( O2 ).

a) carbon, hydrogen

b) carbon, hydrogen, oxygen, nitrogen

c) carbon, hydrogen, oxygen, nitrogen, phosphorus

d) sugar

e) amino acid

f) nucleotide