Liquid petrol does not ignite spontaneously when exposed to the air because there is not enough molecules that contains energy to reach the activation energy. As a result, the reaction cannot proceed and a supply of energy should be added for the reaction to occur.
I think it’s C but anybody can correct me if I’m wrong
It is an ensemble of similar cells
<span>D. It shows that the electrons within an atom do not have sharp boundaries.</span>
