Use these notes to draw the complete electron configurations of elements 4, 9, 12, 23, 35, and 46 on the periodic table.
a. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²
b. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹
c. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁵
d. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶