A chemist determined by measurements that moles of nickel participated in a chemical reaction. Calculate the mass of nickel that 0.075participated in the chemical reaction. Be sure your answer has the correct number of significant digits.

What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?