What is a net ionic equation? A. An equation showing only what is involved in the reaction
B. An equation that is balanced on both sides
C. An equation that shows all dissolved compounds as ions
O D. An equation that shows all substances as compounds

Ethene molecular fórmula= c2h4molecular weight = 29.046g/molhope it : )

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.