based on the information in the chart, what is the best way to tell samples of tin and aluminum apart? A. test their electrical conductivity B. measure their densities C. determine their state at room temperature D. look at their appearances

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.

Carbon based or cells?

B.) falsehope this !