the element is oxygen as oxygen have 8 protons and 8 neutrons so its atomic number will also be 8 and the electronic configuration will be 2,6 and thus the valency is -2 as it needs two protons to be stable.
2
Aleena Ann answered this
The element has valency 2. the no. of protons = Atomic No.
Since the protons = 8 , the atomic no. is also 8
so the element with atomic no. 8 is OXYGEN
