Exploring Electron Configurations and Orbital Diagrams

The video tutorial explains electron configurations, focusing on how electrons fill orbitals around a nucleus. It covers the shapes and energies of s, p, and d orbitals, and demonstrates the electron configurations for nitrogen, magnesium, and chromium. The tutorial emphasizes filling orbitals from lowest to highest energy and introduces a method using the periodic table for faster configuration writing.

What shape is the s orbital?

• Clover

• Dumbbell

• Barbell

• Sphere

Which orbital looks like a set of barbells?

• f orbital

• d orbital

• p orbital

• s orbital

What does the number in front of an orbital (e.g., 1s, 2p) indicate?

• The shape of the orbital

• The size and energy of the orbital

• The type of element

• The number of electrons it can hold

In which orbital do electrons go first?

• 2s

• 3s

• 2p

• 1s

How many electrons does nitrogen have?

• 6

• 7

• 8

• 5

What is the electron configuration for nitrogen?

• 1s2 2s2 2p4

• 1s2 2s2 2p2

• 1s2 2s2 2p3

• 1s2 2s1 2p4

How many electrons does magnesium have?

• 12

• 10

• 13

• 11

What is the electron configuration for magnesium?

• 1s2 2s2 2p6 4s2

• 1s2 2s2 2p6 3d2

• 1s2 2s2 2p6 3p2

• 1s2 2s2 2p6 3s2

Which orbital is filled after the 4s orbital in chromium?

• 4p

• 3p

• 4d

• 3d

What is the electron configuration for chromium?

• 1s2 2s2 2p6 3s2 3p6 4s1 3d5

• 1s2 2s2 2p6 3s2 3p6 4s2 3d5

• 1s2 2s2 2p6 3s2 3p6 4s2 3d6

• 1s2 2s2 2p6 3s2 3p6 4s2 3d4