Which of these metals would you expect to be found in nature as a deposit of relatively pure element?

a. aluminum
b. lithium
c. silver
d. iron


which metal would most likely replace lead in a solution?

a. potassium
b. copper
c. silver
d. gold

1. Which of these metals would you expect to be found in nature as a deposit of relatively pure element? The Answer is: Lithium. And question 2 is: Potassium - furthest away from lead in the reactivity series.

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.