Question

1. use the aufbau diagram to draw the orbital notation for nickel:

Explanation:

Step1: Determine nickel's atomic number

Nickel (Ni) has an atomic number of 28, so it has 28 electrons.

Step2: Fill electrons according to Aufbau principle

Start from the lowest - energy 1s orbital. The 1s orbital can hold 2 electrons, 2s can hold 2 electrons, 2p can hold 6 electrons, 3s can hold 2 electrons, 3p can hold 6 electrons, 4s can hold 2 electrons, and then start filling the 3d orbital. After filling the previous orbitals, we have filled 2 + 2+6 + 2+6 + 2=20 electrons, and the remaining 8 electrons go into the 3d orbital. Each orbital in the d - subshell can hold a maximum of 2 electrons with opposite spins.

Answer:

1s²2s²2p⁶3s²3p⁶4s²3d⁸ (In orbital - notation form, draw arrows in boxes: 1s has one box with two arrows of opposite spin, 2s has one box with two arrows of opposite spin, 2p has three boxes with two arrows in each box for a total of 6 arrows, 3s has one box with two arrows of opposite spin, 3p has three boxes with two arrows in each box for a total of 6 arrows, 4s has one box with two arrows of opposite spin, 3d has five boxes with two arrows in four boxes and one arrow in each of the remaining box to represent 8 electrons)