Mastering Orbital Diagrams and Electron Configurations in Chemistry

This video tutorial explains how to draw orbital diagrams and place electrons within them, using elements like nitrogen, magnesium, phosphorus, and ions such as sulfide, aluminum, and cobalt. It covers electron configurations, paramagnetism, and diamagnetism, emphasizing the importance of filling orbitals from lower to higher energy levels and handling transition metal ions carefully.

What is the electron configuration of nitrogen?

• 1s2 2s2 2p2

• 1s2 2s2 2p4

• 1s2 2s1 2p3

• 1s2 2s2 2p3

What is the term for orbitals that have the same energy?

• Paired orbitals

• Magnetic orbitals

• Isotopic orbitals

• Degenerate orbitals

Which of the following is true about a paramagnetic substance?

• It is strongly repelled by a magnetic field.

• It is weakly repelled by a magnetic field.

• It is strongly attracted to a magnetic field.

• It is weakly attracted to a magnetic field.

How many unpaired electrons does nitrogen have?

• One

• Two

• None

• Three

What is the electron configuration of magnesium?

• 1s2 2s2 2p6 3s2

• 1s2 2s2 2p6 3p2

• 1s2 2s2 2p6 3s1

• 1s2 2s2 2p5 3s2

How many electrons does a sulfide ion have?

• 18

• 16

• 14

• 20

What is the electron configuration of the aluminum ion with a +3 charge?

• 1s2 2s2 2p5

• 1s2 2s2 2p6 3p1

• 1s2 2s2 2p6 3s1

• 1s2 2s2 2p6

When removing electrons from a transition metal ion, from which energy level should they be removed first?

• The lowest energy level

• The s sublevel

• The highest energy level

• The d sublevel

What is the electron configuration of cobalt before it loses electrons to form a +2 ion?

• 4s2 3d6

• 4s1 3d8

• 4s2 3d7

• 4s0 3d7

How many electrons does the cobalt +2 ion have?

• 25

• 27

• 24

• 26