Electron Configuration and Orbital Capacity

The video tutorial explains how to write the electron configuration for sodium. It begins by identifying the number of electrons using the atomic number from the periodic table. Sodium has 11 electrons, and the tutorial guides through filling the s and p orbitals step-by-step, resulting in the configuration: 1s² 2s² 2p⁶ 3s¹.

What does the atomic number of an element represent?

• The number of isotopes

• The number of protons and electrons

• The number of neutrons

• The number of valence electrons

How many electrons can the 1s orbital hold?

• Six electrons

• Four electrons

• Two electrons

• One electron

Which orbital comes after the 1s orbital in the electron configuration process?

• 2p orbital

• 3p orbital

• 3s orbital

• 2s orbital

How many electrons can the 2p orbital hold?

• Four electrons

• Two electrons

• Eight electrons

• Six electrons

What is the total number of electrons in the 1s, 2s, and 2p orbitals combined?

• Eight electrons

• Ten electrons

• Twelve electrons

• Fourteen electrons

Which orbital is filled after the 2p orbital in sodium's electron configuration?

• 3p orbital

• 4s orbital

• 2d orbital

• 3s orbital

What is the complete electron configuration for sodium?

• 1s² 2s² 2p⁶ 3d¹

• 1s² 2s² 2p⁶ 3p¹

• 1s² 2s² 2p⁶ 4s¹

• 1s² 2s² 2p⁶ 3s¹