Scientists have genetically engineered bacteria to feed exclusively in petroleum products. how can this technology benefit the environment?

They carry out the exchange of gases as we breathe ( oxygen and carbon dioxide).

The problem here is that according to aufbau principle before 3d orbital 4s subshell comes.after filling 3p orbital with electrons you have 4 electrons left, you place two in 4s with opposite spin and the other two in 3d in any of its two orbitals of total five orbitals with the same spin.

Electrons are emitted