Which of the following statements are true regarding the oxygen atom?
Valence electrons of oxygen are 6 and each oxygen atom will share 2 valence electrons to make a double bond with other oxygen atom.
The number of valence electrons of oxygen is 6 and in order to attain octet configuration (i.e.8 valence electrons in the outermost shell), it needs to share 2 electron with another atom(s). i.e. each oxygen atom will share 2 of its electrons.
Thus total number of electrons shared is 4 and unshared electrons are 4. Thus attaining an octet configuration.