What is the electron configuration of the element with atomic number 12?

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Question: What is the electron configuration of the element with atomic number 12?

Options:

Correct Answer: 1s2 2s2 2p6 3s2

Solution:

The element with atomic number 12 is Magnesium (Mg) with the configuration 1s2 2s2 2p6 3s2.

What is the electron configuration of the element with atomic number 12?

What is the electron configuration of the element with atomic number 12?

Step 1: Identify the atomic number. The atomic number given is 12.
Step 2: Find the element that corresponds to atomic number 12. This element is Magnesium (Mg).
Step 3: Understand that the electron configuration shows how electrons are arranged in an atom.
Step 4: Start filling the electron shells according to the Aufbau principle.
Step 5: Fill the 1st shell (1s) with 2 electrons: 1s2.
Step 6: Fill the 2nd shell (2s) with 2 electrons: 2s2.
Step 7: Fill the 2nd shell (2p) with 6 electrons: 2p6.
Step 8: Fill the 3rd shell (3s) with 2 electrons: 3s2.
Step 9: Combine all the filled shells to write the complete electron configuration: 1s2 2s2 2p6 3s2.

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