The video tutorial explores the concept of electrons, starting with an introduction to the Bohr model and its depiction of electron arrangement in shells and subshells. It delves into the complexity of electron configurations, explaining the roles of orbitals and the rules for filling them. The tutorial provides detailed examples of electron configurations for elements like aluminum, boron, oxygen, and potassium, using both Bohr models and orbital diagrams. The video aims to enhance understanding of electron arrangements and configurations in atoms.

What is the simplest model to show the arrangement of electrons in shells?

• Thomson model

• Rutherford model

• Quantum model

• Bohr model

How many subshells are present in the second shell?

• 1

• 2

• 3

• 4

Which subshell is closest to the nucleus in the third shell?

• 3p

• 3d

• 3s

• 3f

What does the number in an orbital diagram represent?

• The orbital type

• The shell number

• The number of electrons

• The subshell type

How many orbitals are present in the 2p subshell?

• 1

• 3

• 2

• 4

What is the first rule for filling out orbital diagrams?

• Start with 3d

• Only one electron per box

• Fill each orbit before moving on

• Start with 2s

How many electrons are in the first shell of aluminum?

• 1

• 2

• 3

• 4

What is the electron configuration for boron?

• 1s2 2s2 2p1

• 1s2 2s2 2p2

• 1s2 2s1 2p2

• 1s2 2s2 2p3

How many electrons does oxygen have?

• 6

• 7

• 8

• 9

What is the electron configuration for potassium?

• 1s2 2s2 2p6 3s2 3p6 4s1

• 1s2 2s2 2p6 3s2 3p6 4s2

• 1s2 2s2 2p6 3s2 3p6 3d1

• 1s2 2s2 2p6 3s2 3p5 4s1