Solve the problems. Express your answers to the correct number of significant figures. 2.31/0.790

     

Explanation:

When you divide two measures, the rule for the number of significant figures of the quotient is to keep the number of significant figures of the measure with least significant figures.

2.31 has three significant figures0.790 has three significant figures

Then, the asnwer must have three significant figures:

           

Since the figure after 2.92 is less than five, you just drop 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.

Must be negative.substance increases