The answer is D I believe
Answer:
In first shell 2 electrons are present and 7 electrons are present in last shell
Explanation:
Oxidation
It is oxidation because two O's 1 x 1 d 2 i's 1 n and 1 a
I think the correct answer from the choices listed above is option A. The three components of air are all <span>classified as pure substances since they are not chemically bonded so they can be separated by certain processes and be present as a pure substance. Hope this answers the question.</span>