Question

1. the atomic number of aluminum is 13. what is the correct designation of the electron configuration of aluminum? clear all 1s²1p⁶2s²2p¹ 1s²2s²2p⁶3s²3p¹ 1s²2s²2p⁶2d¹ 1s²2s²2p⁶3s²3d¹

Explanation:

Step1: Recall electron - filling rules

Electrons fill orbitals in the order of increasing energy: 1s, 2s, 2p, 3s, 3p, etc. The s - orbital can hold a maximum of 2 electrons, the p - orbital can hold a maximum of 6 electrons.

Step2: Fill electrons for aluminum

Aluminum has an atomic number of 13, which means it has 13 electrons. The electron - filling is as follows: 2 electrons in the 1s orbital (1s²), 2 electrons in the 2s orbital (2s²), 6 electrons in the 2p orbital (2p⁶), and 3 electrons in the 3s and 3p orbitals (3s²3p¹). So the electron configuration of aluminum is 1s²2s²2p⁶3s²3p¹.

Answer:

1s²2s²2p⁶3s²3p¹