Question

given the diagram below, which element is represented? given this diagram, what is the electron - configuration? 1s2 2s2 2p6 3s2 3p6 3d6 4s2 3d6 4s2 3p6 2p6 2s2 1s2 1s2 2s2 2p6 3s2 3p6 4s2 3d6 1s2 2s2 2p6 3s2 4s2 3p6 3d6 multiple - choice question

Explanation:

Step1: Read electron - filling diagram

Count the number of electrons in each orbital following the Aufbau principle, Pauli - exclusion principle, and Hund's rule.

Step2: Write electron configuration

Starting from the lowest energy level (1s), fill the orbitals. The 1s orbital has 2 electrons, 2s has 2 electrons, 2p has 6 electrons, 3s has 2 electrons, 3p has 6 electrons, 4s has 2 electrons, and 3d has 6 electrons.

Answer:

1s2 2s2 2p6 3s2 3p6 4s2 3d6