What is the electron configuration of the element with atomic number 26?

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Question: What is the electron configuration of the element with atomic number 26?

Options:

Correct Answer: 1s2 2s2 2p6 3s2 3p6 4s2 3d6

Solution:

The electron configuration of iron (Fe), which has an atomic number of 26, is 1s2 2s2 2p6 3s2 3p6 4s2 3d6.

What is the electron configuration of the element with atomic number 26?

What is the electron configuration of the element with atomic number 26?

Step 1: Identify the element with atomic number 26. This element is iron (Fe).
Step 2: Understand that the electron configuration describes how electrons are distributed in the atom's orbitals.
Step 3: Start filling the orbitals with electrons according to the Aufbau principle, which states that electrons fill the lowest energy levels first.
Step 4: Fill the 1s orbital with 2 electrons: 1s2.
Step 5: Fill the 2s orbital with 2 electrons: 2s2.
Step 6: Fill the 2p orbital with 6 electrons: 2p6.
Step 7: Fill the 3s orbital with 2 electrons: 3s2.
Step 8: Fill the 3p orbital with 6 electrons: 3p6.
Step 9: Fill the 4s orbital with 2 electrons: 4s2.
Step 10: Finally, fill the 3d orbital with the remaining 6 electrons: 3d6.
Step 11: Combine all the filled orbitals to write the complete electron configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d6.

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