Here are the steps to determine the electronic configuration for atomic number 13:

*Atomic Number: 13 (Aluminum)*

*Step 1: Determine the Number of Electrons*

Atomic Number = Number of Electrons
Z = 13

*Step 2: Fill the Energy Levels*

Fill the energy levels in increasing order of energy:

1. 1s (2 electrons)
2. 2s (2 electrons)
3. 2p (6 electrons)
4. 3s (2 electrons)
5. 3p (1 electron)

*Step 3: Write the Electronic Configuration*

Write the electronic configuration using the filled energy levels:

1s² 2s² 2p⁶ 3s² 3p¹

*Explanation:*

– 1s²: 2 electrons in the 1s orbital
– 2s²: 2 electrons in the 2s orbital
– 2p⁶: 6 electrons in the 2p orbital
– 3s²: 2 electrons in the 3s orbital
– 3p¹: 1 electron in the 3p orbital

*Electronic Configuration:*

[Ne] 3s² 3p¹

or

1s² 2s² 2p⁶ 3s² 3p¹

This electronic configuration represents Aluminum (Al), atomic number 13.

Would you like to practice with another atomic number or explore more atomic concepts?