Answer
A) 1s2 2s2 2p6 3s2 3p6 4s
B) 1s2 2s2 2p6 3s2 3p
C) 1s2 2s2 2p6 3s2 3p4
D) 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2
Work Step by Step
A) Group 1A and Period 4 intersect at the element potassium. Use the periodic table as a guide in writing down its electron configuration.
B) Group 3A and Period 3 intersect at the element aluminum. Use the periodic table as a guide in writing down its electron configuration.
C) Group 6A and Period 3 intersect at the element sulfur. Use the periodic table as a guide in writing down its electron configuration.
D) Group 2A and Period 6 intersect at the element barium. Use the periodic table as a guide in writing down its electron configuration.
