Electron Configuration in Orbital Notation

This video tutorial by Mr. Boand covers the process of drawing electron configurations in orbital notation, specifically for sodium. It begins with an introduction to sodium's atomic number and electron count, followed by a step-by-step guide on filling the 1s, 2s, and 2p orbitals according to Hund's rule. The tutorial concludes with the completion of the 3s orbital and an explanation of quantum numbers for sodium's final electron.

What is the main topic of this video?

• Drawing electron configurations in orbital notation

• Understanding molecular geometry

• Drawing Lewis structures

• Balancing chemical equations

What is the atomic number of sodium?

• 12

• 10

• 13

• 11

How many electrons does a neutral atom of sodium have?

• 10

• 13

• 11

• 12

Which orbital is filled first when drawing the electron configuration for sodium?

• 3s

• 2p

• 1s

• 2s

How many electrons can the 1s orbital hold?

• 1

• 2

• 3

• 4

According to Hund's rule, how should electrons be filled in the 2p orbitals?

• All in one orbital first

• All in the 2s orbital first

• Randomly

• One in each orbital before pairing

How many electrons are in the 2s orbital of sodium?

• 4

• 1

• 2

• 3

Which orbital is filled after the 2p orbitals in sodium?

• 1s

• 2s

• 3p

• 3s

What is the angular momentum quantum number for an s-shaped orbital?

• 3

• 2

• 1

• 0

What is the spin value of the first electron in the 3s orbital of sodium?

• +1

• +1/2

• -1/2

• 0