Understanding Electron Configuration and Aufbau Diagrams

What is the primary purpose of an Aufbau diagram?

• To calculate the number of protons in an atom

• To depict the atomic mass of elements

• To show the chemical properties of elements

• To illustrate the energy levels of electrons

In the electron configuration of aluminum, which block is filled after the 2p block?

• 3s block

• 3p block

• 1s block

• 2s block

What is the maximum number of electrons that an orbital can hold according to Pauli's Exclusion Principle?

• Three

• Four

• Two

• One

In the Aufbau diagram, what does each block represent?

• An atom

• An electron

• An orbital

• A molecule

What is the correct order of filling orbitals in an Aufbau diagram?

• 3s, 2p, 1s, 3p, 2s

• 2s, 1s, 3p, 2p, 3s

• 1s, 2s, 2p, 3s, 3p

• 2p, 3s, 1s, 2s, 3p

In the Aufbau diagram, what does the arrow labeled 'energy' represent?

• The number of protons

• The direction of electron spin

• The increase in energy levels

• The decrease in atomic mass

According to Hund's Rule, how should electrons be distributed in orbitals of the same energy level?

• Fill the leftmost orbital last

• Fill the rightmost orbital first

• Fill one electron per orbital before pairing

• Pair them up immediately

When constructing the Aufbau diagram for sulfur, how many electrons are placed in the 3p block?

• Eight

• Two

• Four

• Six

For carbon, how many electrons are placed in the 2p block in its Aufbau diagram?

• Four

• One

• Two

• Three

What is the electron configuration of calcium in terms of its s and p blocks?

• 1s2 2s2 2p6 3s2 3p4 4s2

• 1s2 2s2 2p6 3s2 3p6 4p2

• 1s2 2s2 2p6 3s2 3p6 4s1

• 1s2 2s2 2p6 3s2 3p6 4s2